Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Species in the family or subfamily Acipenseridae: [ 212 ] records

accipenser, Sturio Strøm [H.] 1784:129 [Physisk-oeconomisk beskrivelse over Eger-praestgiaeld i Aggerhuus-stift i Norge; ref. 22961] Boskerud District, southwest of Oslo, Norway. No types known. Declared a nomen protectum under Art. 23.9.1.2 by Kottelat & Freyhof 2009:79 [ref. 30320] in favor of Acipenser oxyrinchus Mitchill 1815. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). •In the synonymy of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Nomen Protectum. Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

aculeatus, Acipenser Lovetsky [A.] (ex Fischer) 1834:262, Pl. 19 (fig. 2) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Dnjepr River in Jekaterinoslaw/Yekaterinoslav Province, Russia. [Original as "Fluvius Borysthenes. Sed uti videtur, locis restrictis Gubern. Catherinoslawl."] •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

acutirostris, Acipenser Ayres [W. O.] 1854:2 [The Pacific [newspaper] v. 3 and 4 (thru no. 6); ref. 157] San Francisco, California, U.S.A. No types known. Appeared first as above on 1 Dec.; then in Ayres 1854:15 [ref. 18923]. •Valid as Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Synonym of Acipenser medirostris Ayres 1854 -- (Mecklenburg et al. 2002:114 [ref. 25968]). Current status: Synonym of Acipenser medirostris Ayres 1854. Acipenseridae. Habitat: freshwater, brackish, marine.

acutirostris, Acipenser gueldenstaedtii var. Antipa [G.] 1909:262, Pl. 20 (fig. 107) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River, Romania. Appeared as Acipenser güldenstaedtii var. acutirostris. Treated by Kottelat 1997 as infrasubspecific. Not available. Junior homonym of Acipenser acutirostris Ayres 1854. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). 1°Homonym. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

acutirostris, Acipenser ruthenus form Roussow [G.] 1955:79 [Annales de l'ACFAS v. 21 (Section 3, Biologie) (for 1953-1954); ref. 26406] Not available; infrasubspecific. •Wrongly treated as a subspecies of [in the synonymy of] Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Infrasubspecific. Current status: Synonym of Acipenser. Acipenseridae.

agassizii, Acipenser (Antaceus) Duméril [A. H. A.] 1867:181, Pl. 11 (figs. 2, 2a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:237, Pl. 18 (figs. 3, 3a-b) [ref. 1147]. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Synonym of Acipenser medirostris Ayres 1854 -- (authors). Current status: Synonym of Acipenser medirostris Ayres 1854. Acipenseridae. Habitat: freshwater, brackish, marine.

alba, Acipenser ruthenus var. Antipa [G.] 1909:249, Pl. 31 (fig. 93a) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Romania. No types known. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

albinea, Acipenser ruthenus var. Brusina [S.] 1902:64 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Sava at Rugvice; Kupa at Siska, Croatia. No types known. Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

albula, Acipenser Forster [J. R.] 1767:354 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Volga River, Russia. No types known. Not available, as named alternative for Acipenser beluga Forster 1767. See Acipenser beluga Forster 1767. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

albus, Parascaphirhynchus Forbes [S. A.] & Richardson [R. E.] 1905:38, Pls. 4, 5 (1), 6(1), 7(1) [Bulletin of the Illinois State Laboratory of Natural History v. 7 (art. 4); ref. 1345] Mississippi River at or near Grafton, Jersey County, Illinois, U.S.A. Syntypes: (9) INHS 26944 (3 specimens, 2 heads). Type catalog: Smith & Bridges 1960:253 [ref. 21197], Sabaj et al. 1997:260 [ref. 23225]. •Valid as Scaphirhynchus albus (Forbes & Richardson 1905) -- (Lee et al. 1980:43 [ref. 22416], Robison & Buchanan 1988:79 [ref. 23393], Tomelleri & Eberle 1990:13 [ref. 24089], Page & Burr 1991:28 [ref. 18983], Etnier & Starnes 1993:101 [ref. 22809], Cross & Collins 1995:23 [ref. 23394], Mayden & Kuhajda 1996:260 [ref. 22395], Ross et al. 2001:76 [ref. 25978], Scott 2003:671 [ref. 26987], Nelson et al. 2004:58 [ref. 27807], Scharpf 2005:7 [ref. 28940], Page & Burr 2011:139 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Page et al. 2023:49 [ref. 40505]). Current status: Valid as Scaphirhynchus albus (Forbes & Richardson 1905). Acipenseridae. Distribution: North America: mostly main channels of Missouri and lower Mississippi rivers (U.S.A.). Habitat: freshwater.

aleutensis, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:285 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Canaga Island, Aleutian Islands, Alaska, U.S.A. [in error]. No types known. See Mecklenburg et al. 2002:115 [ref. 25968] who say not from Alaska and not transmontanus. •Questionably a synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). •Synonym of Acipenser transmontanus Richardson 1837 -- (Scott & Crossman 1998:100 [ref. 24570]). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

alexandri, Acipenser (Antaceus) Duméril [A. H. A.] 1867:183, Pl. 15 (figs. 1, 1a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:239, Pl. 15 (figs. 1, 1a-b) [ref. 1147]. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Synonym of Acipenser medirostris Ayres 1854. Current status: Synonym of Acipenser medirostris Ayres 1854. Acipenseridae. Habitat: freshwater, brackish, marine.

anasimos, Acipenser (Huso) Duméril [A. H. A.] 1870:122 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] St. Louis, Missouri, U.S.A. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

anthracinus, Acipenser (Huso) Duméril [A. H. A.] 1870:126, Pl. 15 (figs. 4, 4a-b) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Erie, North America. Syntypes: MNHN 0000-9096 (1, dry), 0000-9112 (1, dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570] as athracinus). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

atelaspis, Acipenser (Huso) Duméril [A. H. A.] 1870:141 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Saskatchewan River, Canada. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

atlanticus, Accipenser Rafinesque [C. S.] 1820:246 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] U.S.A. Also in Rafinesque 1820:79 [ref. 3592]. Based on Acipenser sturio of Mitchill 1815:461 [ref. 13292] (not of Linnaeus). Correct spelling of genus is Acipenser. Acipenseridae. Habitat: freshwater, brackish, marine.

attilus, Accipenser Rafinesque [C. S.] 1820:246 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Also in Rafinesque 1820:79 [ref. 3592] and in Bonaparte 1846:21 [ref. 519]. Name only and not available. Correct spelling of genus is Acipenser. •In the synonymy of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae.

attilus, Acipenser Gray [J. E.] 1851:13 [List of the specimens of fish in the collection of the British Museum.; ref. 4939] As a replacement name for Acipenser sturio Linnaeus 1758 as treated by Kottelat 1997:33 [ref. 22952]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Replacement Name. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

ayresii, Acipenser (Antaceus) Duméril [A. H. A.] 1867:171, Pls. 12 (figs. 1-1b), 16 (fig. 3) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype (unique): whereabouts unknown. Also appeared in Duméril 1870:226, Pl. 18 (figs. 2, 2a-b) [ref. 1147]. •Synonym of Acipenser transmontanus Richardson 1836. Current status: Synonym of Acipenser transmontanus Richardson 1836. Acipenseridae. Habitat: freshwater.

baerii, Acipenser Brandt [J. F.] 1869:115 [Mélanges biologiques v. 7; ref. 618] Ob and Lena river systems, Siberia, Russia. Syntypes: whereabouts unknown. For remarks on systematics see Kottelat 2006:15 [ref. 28831] •Valid as Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Coad 1995:6 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:5 [ref. 25213] as baeri, Chereshnev 1996:598 [ref. 24659] as baeri, Coad 1996:84 [ref. 25304] as baeri, Bemis et al. 1997:37 [ref. 22871], Sokolov 1997:47 [ref. 24690] as baeri, Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760] with subspecies, Sokolov 1998:19 [ref. 23571], Dyer 2000:89 [ref. 26678] as baeri, Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:36 [ref. 26586], Mecklenburg et al. 2002:115 [ref. 25968], López et al. 2003:7 [ref. 27366] as cf. baerii, Sideleva 2003:8 [ref. 27815] as baerii with subspecies, Hanel 2003:47 [ref. 27894], Menni 2004:71 [ref. 28131] as cf. baerii, Bogutskaya & Naseka 2004:22 [ref. 28183] with subspecies, Kottelat 2006:15 [ref. 28831], Ocock et al. 2006:26 [ref. 28933], Kottelat & Freyhof 2007:50 [ref. 29996], Mecklenburg et al. 2011:117 [ref. 31212], Ruban et al. 2011:471 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Dolgov 2013:915 [ref. 33112], Parin et al. 2014:40 [ref. 33547], Litz & Koerber 2014:5 [ref. 33622] as baeri, Mirande & Koerber 2015:8 [ref. 35117] as baeri, Zhang et al. 2016:44 [ref. 34477] as baeri, Nión et al. 2016:24 [ref. 35565], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:35 [ref. 41055], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:143 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:78, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:13 [ref. 37983], Çiçek et al. 2022:4 [ref. 38985], Dyldin et al. 2022:[8] [ref. 39193], Çiçek et al. 2023:328 [ref. 40625], Loureiro et al. 2023:178 [ref. 40506], Çiçek et al. 2024:26 [ref. 40789]). Current status: Valid as Acipenser baerii Brandt 1869. Acipenseridae. Distribution: Northeastern Asia: Ob' River to Kolyma River, Arctic rivers of Siberia (Russia). Introduced elsewhere. Habitat: freshwater, brackish.

baicalensis, Acipenser stenorrhynchus var. Nikolskii [A. M.] 1896:401 [Ezhegodnik, Zoologicheskago Muzeya Imperatorskoi Akademii Nauk v. 1; ref. 14614] Lake Baikal, Siberia, Russia. Syntypes: MLSU 1631 (1), ZIN 10641 (2). •Synonym of Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies baicalensis Nikolskii 1896 as described -- (Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:20 [ref. 23571], Sideleva 2001:45 [ref. 26181], Sideleva 2003:8 [ref. 27815], Ocock et al. 2006:26 [ref. 28933], Romanov et al. 2017:820 [ref. 35687], Dyldin et al. 2020:102 [ref. 37569], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). Current status: Synonym of Acipenser baerii Brandt 1869. Acipenseridae. Habitat: freshwater, brackish.

bairdii, Acipenser (Huso) Duméril [A. H. A.] 1870:145 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Havre de Grace, Maryland, U.S.A. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

baschmakovae, Acipenser ruthenus ruzskyi natio Johansen [B. G.] 1946:173 [Trudy Tomskogo Gosudarstvennogo Universiteta v. 97; ref. 19607] Infrasubspecific and unavailable; from Narym, Ob R. basin, Siberia, Russia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]) Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

beluga, Acipenser Forster [J. R.] 1767:354 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Volga River, Russia. No types known. Not available, as named alternative as Acipenser albula or A. beluga. See Acipenser albula Forster 1767. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

birostrata, Acipenser ruthenus var. Brusina [S.] 1902:65 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Croatia. Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

brachyrynchus, Acipenser Ayres [W. O.] 1854:2 [The Pacific [newspaper] v. 3 and 4 (thru no. 6); ref. 157] San Francisco Bay, California, U.S.A. Possible syntypes: BMNH 1863.10.9.37 [from Ayres] (1). Appeared first as above on 1 Dec.; then in Ayres 1854 (Dec. 25):15 [ref. 18923]. •Synonym of Acipenser transmontanus Richardson 1836. Current status: Synonym of Acipenser transmontanus Richardson 1836. Acipenseridae. Habitat: freshwater.

brandtii, Acipenser Günther [A.] 1870:336, 517 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Black Sea; Caspian Sea. No types known. Based on Acipenser schypa (in part) of Brandt & Ratzeburg. •Based on a hybrid of Huso huso x Acipenser nudiventris -- (Berg 1948:65 [ref. 12882], Kottelat 1997:183 [ref. 22952]). Hybrid. Acipenseridae.

brevirostris, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name only, not available. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

brevirostris, Acipenser ruthenus var. Antipa [G.] 1909:250, Pl. 31? (fig. 94) [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Objectively invalid if treated as available, preoccupied by Acipenser brevirostrum Lesueur 1818. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Danube R. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

brevirostris, Pseudoscaphirhynchus fedtschenkoi forma Berg [L. S.] 1905:37 [Izviestii Turkestanskago otdiela Russkago geograficheskago obschchestva v. 4; ref. 15338] Syr Darya River, Kazakhstan. Syntypes: ZIN 4528 (1 of 3, 300 mm), 11745 (2). Misspelled brevirosis and brevirtis in text, brevirostris correct. Regarded as infrasubspecific and unavailable from above; subsequent use not researched. Infrasubspecific. Acipenseridae.

brevirostrum, Acipenser Lesueur [C. A.] 1818:390 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Delaware River, U.S.A. Holotype: ANSP 16953 (mounted specimen). Additional material: (1). Type catalog: Böhlke 1984:17 [ref. 13621]. As Acipenser brevirostrus in some early literature; but apparently treated as a noun in apposition by current workers. •Valid as Acipenser brevirostrum Lesueur 1818 -- (Lee et al. 1980:38 [ref. 22416], Smith 1986:44 [ref. 22186], Robins & Ray 1986:46 [ref. 23100], Scott & Scott 1988:65 [ref. 25518], McAllister 1990:40 [ref. 14674], Burkhead & Jenkins 1991:342 [ref. 21804], Page & Burr 1991:25 [ref. 18983], Musick et al. in Jenkins & Burkhead 1994:185 [ref. 21581], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Murdy et al. 1997:54 [ref. 23144], Birstein & Bemis 1997:159 [ref. 29760], Scott & Crossman 1998:80 [ref. 24570], Musick et al. 2000:10 [ref. 24959], Musick in Collette & Klein-MacPhee 2002:83 [ref. 26158], Scott 2003:671 [ref. 26987], Nelson et al. 2004:58 [ref. 27807], Scharpf 2005:6 [ref. 28940], Page & Burr 2011:134 [ref. 31215], Hilton et al. 2011:11 [ref. 31407], Page et al. 2013:58 [ref. 32708], Kynard et al. 2016:209 [ref. 35295], Robins et al. 2018:41 [ref. 35886], Page et al. 2023:48 [ref. 40505]). Current status: Valid as Acipenser brevirostrum Lesueur 1818. Acipenseridae. Distribution: Atlantic Coast from New Brunswick, Canada to northern Florida, U.S.A. Habitat: freshwater, brackish, marine.

buffalo, Acipenser (Antaceus) Duméril [A. H. A.] 1867:175, Pl. 14 (figs. 1, 1a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Lake Erie, Buffalo, New York, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:231, pl. 19 (fig. 1) [ref. 1147]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

carbonarius, Acipenser Agassiz [L.] 1850:271, Pl. 5 (figs. 1-3) [Lake Superior; ref. 66] Michipicotin, on northeastern shore of Lake Superior, North America. Holotype (unique): whereabouts unknown. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

caryi, Acipenser (Antaceus) Duméril [A. H. A.] 1867:169, Pl. 12 (figs. 2, 2a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype: MCZ 24034 (not found). Also in Duméril 1870: 224, Pl. 18 (figs. 1, 1a-b) [ref. 1147]. •Synonym of Acipenser transmontanus Richardson 1836. Current status: Synonym of Acipenser transmontanus Richardson 1836. Acipenseridae. Habitat: freshwater.

caspicus, Huso huso Babushkin [N. Ya.] 1942:131 [Izvestiia Azerbaidzhankoi nauchno-issledovatel'skpi rybokhoziaistvennoi stantsii. Baku, Russia. No. 7; ref. 21746] Caspian Sea. No types known. •Synonym of Huso huso (Linnaeus 1758), but a valid subspecies as described -- (Lelek 1987:55 [ref. 22962], Esmaeili et al. 2018:7 [ref. 36089]). •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Coad 1995:7 [ref. 23608], Kottelat 1997:34 [ref. 22952], Esmaeili et al. 2017:26 [ref. 35254], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

cataphractus, Acipenser Gray [J. E.] (ex Rapp) 1835:122 [Proceedings of the Zoological Society of London 1834 (pt 2); ref. 18155] Mississippi River, U.S.A. Possible holotype: BMNH 2004.12.8.3. The diagnosis was quoted from a manuscript by Rapp but the description was by Gray; authorship herein regarded as Gray (ex Rapp). •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

cayennensis, Acipenser (Acipenser) Duméril [A. H. A.] 1870:189 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Oyapock River and Cayenne, French Guiana. Holotype: MNHN 0000-3493 (dry). Type catalog: Bertin 1940:248-249 [ref. 293]. Acipenseridae.

chatys, Acipenser baeri Dryagin [P. A.] 1948:532 [Zoologicheskii Zhurnal v. 27 (no. 6); ref. 13007] From Lena to Kolyma rivers, Sakha-Yakutia, northeastern Russia. Syntypes: (27). •Synonym of Acipenser baerii Brandt 1869 -- (Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies chatys as described -- (Sokolov 1998:20 [ref. 23571], Bogutskaya & Naseka 2004:23 [ref. 28183], Romanov et al. 2017:820 [ref. 35687], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). Current status: Synonym of Acipenser baerii Brandt 1869. Acipenseridae. Habitat: freshwater, brackish.

chinensis, Acipenser Gray [J. E.] 1835:no page number, Pl. 98 (fig. 5) [Illustrations of Indian zoology; ref. 1878] China. No types known. Published about 20 Feb. 1835. Acipenseridae.

cincinnati, Acipenser (Antaceus) Duméril [A. H. A.] 1867:174, Pl. 14 (figs. 2, 2a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Cincinnati, Ohio, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:229 [ref. 1147]. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

colchica, Acipenser gueldenstadti var. Marty [V. J.] 1940:869 [Zoologicheskii Zhurnal v. 19 (no. 6); ref. 17607] Southeastern part of Black Sea near mouth of Rioni and Inguri rivers, Georgia, Eurasia. Syntypes: (many). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833, but a valid subspecies -- (Berg 1948:84 [ref. 12882], Svetovidov 1973:82 [ref. 7169], Lelek 1987:25 [ref. 22962], Ninua & Japoshvili 2008:164 [ref. 31251]). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], see also Sokolov 1998:21 [ref. 23571]). •Synonym of Acipenser persicus Borodin 1897, but a valid subspecies -- (Reshetnikov et al. 1997:725 [ref. 24702]). •Synonym of Acipenser persicus Borodin 1897 -- (Bogutskaya & Naseka 2004:24 [ref. 28183]). •Valid as Acipenser colchicus Marty 1940 -- (Kottelat & Freyhof 2007:50 [ref. 29996], Çiçek et al. 2015:142 [ref. 35151], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:78 [ref. 37569], Dyldin et al. 2022:[9] [ref. 39193], Çiçek et al. 2023:328 [ref. 40625], Çiçek et al. 2024:27 [ref. 40789]). Current status: Valid as Acipenser colchicus Marty 1940. Acipenseridae. Distribution: Eurasia: southeastern Black Sea basin and lower Danube River (Romania, Bulgaria, Turkey, Georgia). Habitat: freshwater.

copei, Acipenser (Huso) Duméril [A. H. A.] 1870:108 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Missouri River (?), U.S.A. Holotype (unique): MCZ 100696 [tracking no.] (not found). •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

curensis, Huso huso caspicus natio Babushkin [N. Ya.] 1942:131 [Izvestiia Azerbaidzhankoi nauchno-issledovatel'skpi rybokhoziaistvennoi stantsii. Baku, Russia. No. 7; ref. 21746] Infrasubspecific, not available; from Kura River, Caspian Sea basin. •In the synonymy of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952]). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

cyrensis, Acipenser stellatus stellatus natio Berg [L. S.] 1932:65 [Les poissons des eaux douces de l'U.R.S.S. Part 1; ref. 278] Not available, infrasubspecific; from Kura River, Azerbaijan. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Berg 1948:100 [ref. 12882], Kottelat 1997:33 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae.

dabryanus, Acipenser Duméril [A. H. A.] 1869:98, Pl. 22 (figs. 1, 1a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 4; ref. 14095] Chang Jiang [Yangtze River], China. Holotype (unique): MNHN 0000-5105. Type catalog: Bertin 1940:249-250 [ref. 293]. Also appeared in Duméril 1870:193 [ref. 1147]. •Valid as Acipenser dabryanus Duméril 1869 -- (Ding 1994:29 [ref. 21531], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Bemis et al. 1997:37 [ref. 22871], Kim 1997:141 [ref. 24032], Birstein & Bemis 1997:158 [ref. 29760], Chen in Chen 1998:36 [ref. 23556], Yue & Chen 1998:9 [ref. 26415], Zhang 2001:30 [ref. 26586] dated 1868, Kim & Park 2002:38 [ref. 25913], Choi et al. 2003:136, 487 [ref. 26218], Hilton et al. 2011:136 [ref. 31407], Zhang et al. 2016:45 [ref. 34477] dated 1868, Zhang et al. 2019:120 [ref. 36699] dated 1868, Guo 2021:70 [ref. 38617]). Current status: Valid as Acipenser dabryanus Duméril 1869. Acipenseridae. Distribution: Yangtze River basin, China and Korea. Habitat: freshwater.

danubialis, Acipenser stellatus Brusina [S.] 1902:59, Fig. 3 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Danube River. Syntypes: whereabouts unknown. •Synonym of Acipenser stellatus Pallas 1771 -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

danubica, Acipenser gueldenstaedti colchicus natio Movchan [Yu. V.] 1967:31 [Vestnik Zoologii v. 6; ref. 23081] Not available, infrasubspecific; from Danube R. •In the synonymy of Acipenser gueldenstaedtii (Brandt & Ratzeburg 1833) -- (Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:23 [ref. 28183]). Infrasubspecific. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

dauricus, Acipenser Georgi [J. G.] 1775:352 [Bemerkungen einer Reise im russischen Reich in 1772; ref. 18104] Amur River; Argun; Schilka; and Onon rivers. No types known. •Valid as Acipenser dauricus Georgi 1775 -- (Vasil'eva et al. 2009:865 [ref. 30626], Parin et al. 2014:41 [ref. 33547]). •Valid as Huso dauricus (Georgi 1775) -- (Berg 1948:58 [ref. 12882], Nakaya in Masuda et al. 1984:18 [ref. 6441], Honma & Itano 1994:317 [ref. 22346], Artyukhin 1995:7 [ref. 23782], Bogutskaya & Naseka 1996:11 [ref. 22798], Chereshnev 1996:599 [ref. 24659], Bemis et al. 1997:37 [ref. 22871], Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:23 [ref. 23571], Yue & Chen 1998:17 [ref. 26415], Nakabo 2000:187 [ref. 25086], Sheiko & Fedorov 2000:16 [ref. 25650], Bogutskaya et al. 2001:42 [ref. 26178], Pietsch et al. 2001:138 [ref. 25688], Zhang 2001:38 [ref. 26586], Nakabo 2002:187 [ref. 26001], Fedorov et al. 2003:23 [ref. 27579], Bogutskaya & Naseka 2004:26 [ref. 28183], Kottelat 2006:85 [ref. 28831], Bogutskaya et al. 2008:313 [ref. 30085], Hilton et al. 2011:136 [ref. 31407], Zhang et al. 2016:45 [ref. 34477], Dyldin & Orlov 2016:546 [ref. 34656], Dyldin et al. 2021:17 [ref. 38804], Dyldin et al. 2020:79, 102 [ref. 37569], Dyldin & Orlov 2021:60 [ref. 38158], Dyldin et al. 2022:[11] [ref. 39193]). Current status: Valid as Huso dauricus (Georgi 1775). Acipenseridae. Distribution: Northwestern Pacific: Sea of Okhotsk and Sea of Japan. Habitat: freshwater, brackish, marine.

dekayi, Acipenser (Huso) Duméril [A. H. A.] 1870:168 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MCZ 8924. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae. Habitat: freshwater, brackish, marine.

derjavini, Acipenser nudiventris Borzenko [M. P.] 1950 [Trudy Kaspiiskogo basseinovogo filiala VNIRO Astrachan (Astrakhan) No. 11; ref. 22959] Kura River, Azerbaijan, Caspian Sea Region. Syntypes: (127) KVNIRO uncat. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Coad 1995:7 [ref. 23608], Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae. Habitat: freshwater, brackish, marine.

desotoi, Acipenser oxyrhynchus Vladykov [V. D.] 1955:755, Pls. 1, 3, 5, 7 [Journal of the Fisheries Research Board of Canada v. 12 (no. 5); ref. 12536] Off Gautier, mouth of Singing River, between Twin Island and Rabbit Island, Jackson County, Mississippi, U.S.A. Holotype: FMNH 59803. Paratypes: FMNH 59804 (1). Type catalog: Ibarra & Stewart 1987:5 [ref. 12367]. Species originally spelled as de sotoi, change mandatory. •Synonym of Acipenser oxyrinchus Mitchill 1815, but a valid subspecies as described -- (Lee et al. 1980:41 [ref. 22416], Ong et al. 1996:464 [ref. 23959], Mettee et al. 1996:79 [ref. 25836], McEachran & Fechhelm 1998:198 [ref. 23897], Scott & Crossman 1998:93 [ref. 24570], Musick et al. 2000:10 [ref. 24959], Ross et al. 2001:76 [ref. 25978], Hilton et al. 2016:31 [ref. 35294]). •Synonym of Acipenser oxyrinchus Mitchill 1915, but a valid subspecies desotoi Vladykov 1955 -- (Birstein & Bemis 1997:159 [ref. 29760], Boschung & Mayden 2004:105 [ref. 27995], Scharpf 2005:7 [ref. 28940], Page & Burr 2011:137, ll, l. [ref. 31215]). •Valid as Acipenser desotoi Vladykov 1955 -- (Robins et al. 2018:42 [ref. 35886], Bagley et al. 2023:312 [ref. 41241], Page et al. 2023:48 [ref. 40505], Fricke et al. 2024:107 [ref. 41622]). Current status: Valid as Acipenser desotoi Vladykov 1955. Acipenseridae. Distribution: Western Atlantic: Gulf of Mexico endemic. Habitat: freshwater, brackish, marine.

donensis, Acipenser stellatus Lovetsky [A.] 1834:263, Pl. 19 (fig. 1) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Don River, Russia. •Synonym of Acipenser stellatus Pallas 1771, but a valid subspecies as described -- (Sokolov 1998:19 [ref. 23571]). •Synonym of Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Kottelat 1997:33 [ref. 22952], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

dubius, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:276 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Not available, name only in synonymy of Acipenser gmelini Fitzinger 1836. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] based on Brusina 1902). Nomen Nudum. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

ducissae, Acipenser (Huso) Duméril [A. H. A.] 1870:98, Pl. 20 (figs. 5, 5a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Holotype (unique): MNHN 0000-4634. Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

erytraea, Acipenser ruthenus var. Antipa [G.] 1909:250, Pl. 31 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Rumania. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]) Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

europeus, Acipenser Brusina [S.] 1902:180 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Sweden. Original not seen. Name in synonymy and not available; a reference to Linnaeus apparently is in error. •In the synonymy of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae.

fedtschenkoi, Scaphirhynchus Kessler [K. F.] 1872:70 [26], Pl. 12 (figs. 36-41) [Izvestiia Imperatorskago Obschchestva Liubitelei Estestvozaniia, Antropologii i Etnografii v. 10 (no. 1); ref. 14134] Syr Darya River near Chinaz, Kazakhstan. Syntypes: (12) ZMMU P-640 (2); none found at ZIN. Type catalog: Svetovidova 1978:256 [ref. 9011], Vasil'eva et al. 2001:15 [ref. 25714]. On p. 26 of separate. Also in Kessler 1873:269 [ref. 18386] and in Kessler 1874:109 [ref. 18387]. •Valid as Pseudoscaphirhynchus fedtschenkoi (Kessler 1872) -- (Berg 1948:108 [ref. 12882], Mitrofanov et al. 1986:162 [ref. 35970], Bemis et al. 1997:37 [ref. 22871], Hilton et al. 2011:136 [ref. 31407]). Current status: Valid as Pseudoscaphirhynchus fedtschenkoi (Kessler 1872). Acipenseridae. Distribution: Central Asia: Syr Darya River drainage. Habitat: freshwater, brackish.

fitzingerii, Acipenser (Huso) Duméril [A. H. A.] (ex Valenciennes) 1870:97, Pl. 20 (figs. 4, 4a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Holotype (unique): MNHN 0000-4638. Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

fulvescens, Accipenser Rafinesque [C. S.] 1817:288 [American Monthly Magazine and Critical Review v. 1; ref. 19654] Lake Erie, North America. No types known. Original genus should have been Acipenser. The two subspecies names, acutirostris and obstusirostris, attributed to Roussow 1955:79 [ref. 26406] in Scott & Crossman 1998:89 [ref. 24570] were only mentioned as forms of Acipenser ruthenus Linnaeus 1758 (not of A. fulvescens) and are not available names. •Valid as Acipenser fulvescens Rafinesque 1817 -- (Lee et al. 1980:39 [ref. 22416], Smith 1986:45 [ref. 22186], Robison & Buchanan 1988:78 [ref. 23393], McAllister 1990:40 [ref. 14674], Tomelleri & Eberle 1990:11 [ref. 24089], Page & Burr 1991:26 [ref. 18983], Boschung 1992:28 [ref. 23239], Etnier & Starnes 1993:99 [ref. 22809], Artyukhin 1995:7 [ref. 23782], Chereshnev 1996:599 [ref. 24659], Stauffer et al. 1995:30 [ref. 23376], Cross & Collins 1995:21 [ref. 23394], Mettee et al. 1996:77 [ref. 25836], Bemis et al. 1997:37 [ref. 22871], Birstein & Bemis 1997:159 [ref. 29760], Scott & Crossman 1998:82 [ref. 24570], Fuller et al. 1999:22 [ref. 25838], Lyons et al. 2000:20 [ref. 26594], Ross et al. 2001:71 [ref. 25978], Nelson et al. 2004:58 [ref. 27807], Bailey et al. 2004:61 [ref. 27882], Boschung & Mayden 2004:102 [ref. 27995], Scharpf 2005:6 [ref. 28940], Page & Burr 2011:135 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Afonso et al. 2016:13, 77 [ref. 36199], Dyldin et al. 2020:97 [ref. 37569], Bagley et al. 2023:312 [ref. 41241], Page et al. 2023:48 [ref. 40505]). Current status: Valid as Acipenser fulvescens Rafinesque 1817. Acipenseridae. Distribution: North America: Hudson Bay (Canada) eastward, south to east-central U.S.A.; introduced in Russia. Habitat: freshwater, brackish.

gillii, Acipenser (Huso) Duméril [A. H. A.] 1870:110, Pl. 15 (figs. 2, 2a-b) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Holotype (unique): MCZ (whereabouts unknown). Acipenseridae. Habitat: freshwater.

girardi, Acipenser (Huso) Duméril [A. H. A.] 1870:132 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Havre de Grace, Maryland, U.S.A. Holotype (unique): MCZ 100689 [tracking number] not found. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

glaber, Acipenser Heckel [J. J.] (ex Fitzinger) in Fitzinger & Heckel 1836:270, Pls. 25 (fig. 3), 28 (figs. 5-6) [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Danube River, Austria. Syntypes: ?NMW 91292 (1, dry). Appeared as name only with author as Heckel [ex Marsilius] in Fitzinger 1832:340 [ref. 5019]; see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Berg 1948:66 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952], Sokolov 1998:21 [ref. 23571], Bilecenoğlu et al. 2002:29 [ref. 26753], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae. Habitat: freshwater, brackish, marine.

gmelini, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:276, Pls. 25 (fig. 2), 30(figs. 17-18) [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Azov Sea or Caspian Sea. Holotype (unique): NMW (not found). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

golis, Acipenser gueldenstaedtii var. Antipa [G.] 1909:261 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Original not seen; from sea south of Portita, Rumania. Treated by Kottelat 1997 as infrasubspecific. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

grisescens, Acipenser ruthenus var. Brandt [J. F.] 1853:320, Fig. 2 [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 1; ref. 20902] Nishni-Novgorod, Russia. No types known. Treated by Kottelat 1997:32 [ref. 22952] from Brandt 1851 as infrasubspecific. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

gueldenstaedtii, Acipenser Brandt [J. F.] & Ratzeburg [J. T. C.] 1833:13, Pl. 3 (figs. 2, 2A-E) [Medizinische Zoologie v. 2; ref. 619] Caspian Sea and tributaries; Black Sea. No types known. Originally as güldenstädtii. •Valid as Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Berg 1948:78 [ref. 12882], Svetovidov 1973:82 [ref. 7169], Svetovidov in Whitehead et al. 1984:221 [ref. 13675] as gueldenstaedti, Lelek 1987:46 [ref. 22962], Coad 1995:6 [ref. 23608] as gueldenstaedti, Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:18 [ref. 24640] as gueldenstaedti, Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:30 [ref. 22952], Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760] with Brandt as author, Sokolov 1998:20 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:28 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:23 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369] as gueldenstaedti with Brandt as author, Kottelat & Freyhof 2007:51 [ref. 29996], Vasil'eva 2007:37 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Ruban et al. 2011:470 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:41 [ref. 33547], Koerber & Litz 2014:2 [ref. 34967], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Barbieri et al. 2015:35 [ref. 35029], Çiçek et al. 2015:142 [ref. 35151], Koerber & Litz 2016:2 [ref. 35098], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:143 [ref. 37026], Koerber et al. 2019:2 [ref. 36736], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:78 [ref. 37569], Iglésias et al. 2020:289 [ref. 37987], Jouladeh-Roudbar et al. 2020:14 [ref. 37983], Koerber et al. 2020:2 [ref. 37480], Kuljanishvili et al. 2020:[4] [ref. 37535], Mirande & Koerber 2020:2 [ref. 37594], Abliazov et al. 2021:8 [ref. 38576], Koerber et al. 2021:2 [ref. 38894], Dyldin et al. 2022:[9] [ref. 39193], Niță et al. 2022:22 [ref. 40471], Çiçek et al. 2023:5 [ref. 40616], Çiçek et al. 2023:328 [ref. 40625], Koerber et al. 2023:2 [ref. 40355], Loureiro et al. 2023:178 [ref. 40506], Nagy et al. 2023:356 [ref. 40348], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:28 [ref. 40789]). Current status: Valid as Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Distribution: Eastern Atlantic; Europe and Middle East: Basins of Sea of Marmara, Black Sea, Sea of Azov and Caspian Sea and adjacent watersheds. Introduced elsewhere. Habitat: freshwater, brackish, marine.

hallowellii, Acipenser (Antaceus) Duméril [A. H. A.] 1867:172 [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Locality unknown [= eastern U.S.A.]. Holotype (unique): MNHN (dry). Type catalog: Bertin 1940:249 [ref. 293]. Also appeared in Duméril 1870:228 [ref. 1147]. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

heckelii, Acipenser Fitzinger [L. J. F. J.] in Fitzinger & Heckel 1836:303, Pls. 26 (fig. 4), 29 (figs. 11-12) [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Adriatic Sea (Mediterranean Sea); rivers Po, Etsch [Adige] and Brenta, Italy. Syntypes: NMW 76784 (1), 92877 (1, dry). Name mentioned first in Brandt & Ratzeburg 1833:29 [ref. 619], not available. Name declared a nomen oblitum in Kottelat & Freyhof 2009:76 [ref. 30320] •Synonym of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952], Kottelat & Freyhof 2009:77 [ref. 30320]). Nomen Oblitum. Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae. Habitat: freshwater, brackish, marine.

helenae, Acipenser (Sterletus) Duméril [A. H. A.] (ex Valenciennes) 1870:258 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Syntypes: MNHN 0000-5176 (2). Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (authors). •Hybrid between Acipenser ruthenus x Acipenser gueldenstaedti -- (Kottelat 1997:183 [ref. 22952]). Hybrid. Current status: Synonym of Acipenser. Acipenseridae. Habitat: freshwater, brackish, marine.

helops, Acipenser Pallas [P. S.] 1814:97 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Major rivers and seas of Russia. No types known. •Synonym of Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882] as hellops, Svetovidov 1973:83 [ref. 7169], Coad 1995:7 [ref. 23608], Kottelat 1997:32 [ref. 22952], Sokolov 1998:22 [ref. 23571], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

heptipus, Accipenser Rafinesque [C. S.] 1818:447 [American Monthly Magazine and Critical Review v. 3 (no. 6) (art. 6) (Oct.); ref. 3587] Not available, name only. Nomen Nudum. Acipenseridae.

hermanni, Scaphirhynchus Kessler [K. F.] (ex Severtzov) 1877:190, Pl. 8 (fig. 25, 25a-b) [The Aralo-Caspian Expedition; ref. 2597] Amu Darya River, Turkmenistan or Uzbekistan. Syntypes: ZIN 3690 (4). •Valid as Pseudoscaphirhynchus hermanni (Kessler 1877) -- (Berg 1948:105 [ref. 12882], Coad 1981:8 [ref. 22348], Salnikov et al. 1996:10 [ref. 22563], Mayden & Kuhajda 1996:261 [ref. 22395], Bemis et al. 1997:37 [ref. 22871], Hilton et al. 2011:136 [ref. 31407], Çiçek et al. 2023:8 [ref. 40326]). Current status: Valid as Pseudoscaphirhynchus hermanni (Kessler 1877). Acipenseridae. Distribution: Central Asia: endemic to Amu Darya River system (Afghanistan, Turkmenistan, Uzbekistan). Habitat: freshwater, brackish.

holbrookii, Acipenser (Huso) Duméril [A. H. A.] 1870:149 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Charleston, South Carolina, U.S.A. Holotype (unique): MCZ 8952. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae.

honneymani, Acipenser (Huso) Duméril [A. H. A.] 1870:177 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Nouvelle-Ecosse, Canada. Holotype (unique): MNHN 0000-4843. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

hospitus, Acipenser Krøyer [H. N.] 1852:780 [Danmarks Fiske; ref. 18437] Northern Öresund [sound betweeen Sweden and Seeland, Denmark]. Holotype (unique): ZMUC (dry). Original not seen. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). •Synonym of Acipenser oxyrinchus Mitchill 1815. Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

hudsonius, Accipenser Rafinesque [C. S.] 1820:247 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Also in Rafinesque 1820:79 [ref. 3592]. Name only, not available. Correct spelling of genus is Acipenser. Nomen Nudum. Acipenseridae.

huso, Acipenser Linnaeus [C.] 1758:238 [Systema Naturae, Ed. X v. 1; ref. 2787] Danube and the rivers of Russia. No types known. •Valid as Acipenser huso Linnaeus 1758 -- (Vasil'eva et al. 2009:865 [ref. 30626], Parin et al. 2014:42 [ref. 33547]). •Valid as Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Svetovidov 1973:84 [ref. 7169], Svetovidov in Whitehead et al. 1984:225 [ref. 13675], Lelek 1987:55 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:16 [ref. 24640], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:33 [ref. 22952], Birstein & Bemis 2007:159 [ref. 29760], Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:23 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:30 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:26 [ref. 28183], Vassilev & Pehlivanov 2005:163 [ref. 28369], Hanel & Lusk 2005:174 [ref. 28804], Fricke et al. 2007:22 [ref. 29533], Kottelat & Freyhof 2007:59 [ref. 29996], Vasil'eva 2007:40 [ref. 30517], Fricke 2008:13 [ref. 30182], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:366 [ref. 33391], Lipej & Dulčić 2010:17 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Jouladeh-Roudbar et al. 2015:859 [ref. 34062], Barbieri et al. 2015:37 [ref. 35029], Çiçek et al. 2015:143 [ref. 35151], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:145 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Kovačić et al. 2020:10 [ref. 37519], Kuljanishvili et al. 2020:[4] [ref. 37535], Abliazov et al. 2021:8 [ref. 38576], Kovačić et al. 2021:18 [ref. 39014], Dyldin et al. 2022:[12] [ref. 39193], Niță et al. 2022:19 [ref. 40471], Çiçek et al. 2023:329 [ref. 40625], Shumka et al. 2023:38 [ref. 40747], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:31 [ref. 40789]). Current status: Valid as Huso huso (Linnaeus 1758). Acipenseridae. Distribution: Eastern Atlantic; Mediterranean Sea; Sea of Marmara; Black Sea; Sea of Azov; Caspian Sea. Introduced elsewhere. Habitat: freshwater, brackish, marine.

husoniformis, Acipenser Lovetsky [A.] 1834:258, Pl. 16 (fig. 1) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Caspian Sea. Acipenseridae.

ichthyocolla, Acipenser Billberg [G. J.] 1833:52 [Linnéska Samfundets Handlingar v. 1 (for 1832); ref. 34146] Danube and the rivers of Russia. No types known. Unnecessary replacement name for "Huso Linn." [should read Acipenser huso Linnaeus 1758]; see Kullander 2016:113 [ref. 34147]. •Synonym of Huso huso (Linnaeus 1758)-- (Kullander 2016:113 [ref. 34147], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Replacement Name. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

ichthyocolla, Huso Bonaparte [C. L.] 1846:22 [Atti della Settima Adunanza degli Scienziati Italiani Sesta Riunione, Milano 7a Adunanza, Napoli, Part 2; ref. 519] Unneeded new name for Acipenser huso Linnaeus 1758. •Synonym of Huso huso (Linnaeus 1758) -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

illyricus, Acipenser stellatus Brusina [S.] 1902:60, Figs. 1-2 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Zadar, Dalmatia, Croatia, Adriatic Sea (Mediterranean Sea). Syntypes: whereabouts unknown. Original not seen. •Synonym of Acipenser stellatus Pallas 1771 -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

intermedia, Pseudoscaphirhynchus fedtschenkoi forma Berg [L. S.] 1905:37 [Izviestii Turkestanskago otdiela Russkago geograficheskago obschchestva v. 4; ref. 15338] Syr Darya River, Kazakhstan. Syntypes: ZIN 4528 (1, 276 mm of 3), 11944 (1). Not available, regarded as infrasubspecific. Infrasubspecific. Acipenseridae.

jeniscensis, Acipenser Herzenstein [S. M.] 1895:79 [Vestnik Rybopromyshlennosti St. Petersburg v. 10; ref. 22000] Turuchansk Dist, Russia. Original not seen; perhaps name only and not available. Berg 1911:204 [ref. 272] cites Herzenstein in litt. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] as jenisensis). Nomen Nudum. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

kaluschka, Acipenser Steller [G. W.] in Pallas 1814:107 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Not available. Name in synonymy of Acipenser orientalis Pallas 1814. Also appeared as name in synonymy under Acipenser dauricus in Fitzinger & Heckel 1836:318 [2077]. Nomen Nudum. Acipenseridae.

kamensis, Acipenser Lovetsky [A.] 1834:262, Pl. 16 (fig. 2) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Kama River, Russia. No types known. evidently spelled camensis on Pl. 16; see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

kankreni, Acipenser (Sterletus) Duméril [A. H. A.] (ex Valenciennes) 1870:256 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Probably Russia. Holotype (unique): MNHN 0000-5173. Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

kaufmanni, Scaphirhynchus Kessler [K. F.] (ex Bogdanov) 1877:194 [The Aralo-Caspian Expedition; ref. 2597] Lower Amu-Darya River, Uzbekistan. Syntypes: SPSU uncat. (1), ZIN 2707 (1, lost), ZMMU P-1456 (1). Type catalog: Svetovidova 1978:256 [ref. 9011], Vasil'eva et al. 2001:15 [ref. 25714], Zhidkov et al. 2019:402 [ref. 37215].. Appeared first in Bogdanov 1874:XLVII [ref. 19624] with no distinguishing features. •Valid as Pseudoscaphirhynchus kaufmanni (Kessler 1877) -- (Berg 1948:104 [ref. 12882], Coad 1981:8 [ref. 22348], Salnikov et al. 1996:10 [ref. 22563], Mayden & Kuhajda 1996:261 [ref. 22395], Bemis et al. 1997:37 [ref. 22871], Hilton et al. 2011:136 [ref. 31407], Zhidkov et al. 2019:402 [ref. 37215], Çiçek et al. 2023:9 [ref. 40326]). Current status: Valid as Pseudoscaphirhynchus kaufmanni (Kessler 1877). Acipenseridae. Distribution: Central Asia: endemic to Amu Darya River system (Afghanistan, Turkmenistan, Uzbekistan). Habitat: freshwater, brackish.

kennicottii, Acipenser (Huso) Duméril [A. H. A.] 1870:130, Pl. 15 (figs. 3, 3a, 3b) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] James River, Virginia, U.S.A. Holotype (unique): MCZ 8944. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

kiangsinensis, Acipenser Dabry de Thiersant [P.] 1872:192, Pl. 50 (fig. 3) [La pisciculture et la pêche en Chine; ref. 12507] Kiang-si, China. Acipenseridae.

kikuchii, Acipenser Jordan [D. S.] & Snyder [J. O.] 1901:302, Pl. 15 (figs. 1-2) [Journal of the College of Science. Imperial University, Tokyo v. 15 (pt 2); ref. 2506] Misaki, Kanagawa Prefecture, Sagami Bay, Japan. Holotype (unique): ZUMT 946 (mounted). Type catalog: Aizawa et al. 2022:214 [ref. 39648]. •Valid as Acipenser kikuchii Jordan & Snyder 1901 -- (Okada 1961:284 [ref. 6363]). •Synonym of Acipenser sinensis Gray 1835 -- (Birstein & Bemis 1997:159 [ref. 29760]). Current status: Synonym of Acipenser sinensis Gray 1835. Acipenseridae. Habitat: freshwater, brackish, marine.

kirtlandii, Acipenser (Huso) Duméril [A. H. A.] 1870:161 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Erie, North America. Holotype (unique): MNHN 0000-3109 (mounted). Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

koster, Acipenser Gmelin [J. F.] 1789:1486 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Caspian Sea. Appeared first as name only in Gmelin 1774:238 [ref. 18140, v. 3]. •Apparently the same as Acipenser kostera Fitzinger 1832. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). Current status: Uncertain as Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

kostera, Acipenser Fitzinger [L. J. F. J.] 1832:340 [Beiträge zur Landeskunde Österreichs unter der Enns, Wien v. 1; ref. 5019] Danube River, Vienna, Austria. Neotype: BMNH 1898.4.11.26. Neotype designated by Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

kostera, Acipenser sturio var. Pallas [P. S.] 1814:96 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Not a scientific name: listed as the Russian name for a variety (Ob R.). Acipenseridae.

kurensis, Acipenser gueldenstaedti persicus natio Belyaeff [W. N.] 1932:68 [Byulleten' Vsekaspiiskoi Rybokhozyaistvennoi Ekspeditsii, Baku 1932 (no. 5-6); ref. 23609] Not available, infrasubspecific; also described temporarily and with Russian name only; from Kura River. Possible subsequent usage of this name needs research. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Coad 1995:6 [ref. 23608]). Infrasubspecific. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

ladanus, Acipenser Ninni [A. P.] (ex Chiereghini) 1872:33 [Rivista critica delle specie dei pesci adriatici descritti nell'opera manoscritta dell'Ab. Stefano Chiereghini di Chioggia.; ref. 17995] Appeared first in Nardo 1847:col. 111 [ref. 17944] as name in synonymy and not available. Probably made available by Ninni 1872:33 [ref. 17995] where Chiereghini manuscript is quoted and name is treated as valid by Ninni. Authorship is probably Nardo 1847, but not translated by us. •Synonym of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae. Habitat: freshwater, brackish, marine.

laevis, Acipenser Agassiz [L.] 1850:267 [Lake Superior; ref. 66] The Pic, Lake Superior, North America. No types known. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

laevissimus, Acipenser Duméril [A. H. A.] (ex Valenciennes) 1870:188 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Elbe River, Germany; River Gironde, Bordeaux, France. Syntypes: MNHN 0000-5158 (1) Elbe River, MNHN 0000-5159 (1) River Gironde. Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

lamarii, Acipenser (Huso) Duméril [A. H. A.] 1870:139 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-9115 (dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

latirostris, Acipenser Parnell [R.] 1831-37:405, Pl. 39 [Memoirs of the Wernerian Natural History Society, Edinburgh v. 7 (art. 2) (for 1831-1837); ref. 18519] Firth of Forth, Scotland. No types known. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

lecontei, Acipenser (Antaceus) Duméril [A. H. A.] 1867:177, Pl. 16 (figs. 1, 1a, 2) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Bay of New York, U.S.A. Syntypes: (2) MNHN 0000-3110 (1, dry). Type catalog: Bertin 1940:249 [ref. 293] with MNHN 3110 as figured holotype. Also appeared in Duméril 1870:232 [ref. 1147]. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Smith 1986:48 [ref. 22186] as leconti and oxyrhynchus, Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

lesueurii, Acipenser (Huso) Duméril [A. H. A.] (ex Valenciennes) 1870:166, Pl. 16 (figs. 1, 1a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MNHN 0000-3489. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae. Habitat: freshwater, brackish, marine.

leucotica, Acipenser ruthenus var. Brandt [J. F.] 1853:320, Fig. 1 [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 1; ref. 20902] Nishnij-Novgorod, Russia. No types known. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific from Brandt 1851, available as above. •Questionably a synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Uncertain as Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

lichtensteinii, Acipenser Bloch [M. E.] & Schneider [J. G.] 1801:348, Pl. 69 [M. E. Blochii, Systema Ichthyologiae; ref. 471] North Sea. Holotype (unique): ZMB 4412. Type catalog: Paepke 1999:42 [ref. 24282]. Declared a nomen protectum under Art. 23.9.1.2 by Kottelat & Freyhof 2009:79 [ref. 30320] in favor of Acipenser oxyrinchus Mitchill 1815. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). •In the synonymy of Acipenser oxyrinchus Mitchill 1815 -- (Kottelat & Freyhof 2009:79 [ref. 30320], Hilton et al. 2016:31 [ref. 35294]). Nomen Oblitum. Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

liopeltis, Acipenser Günther [A.] 1870:341 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Mississippi, U.S.A. Holotype (unique): BMNH 1855.6.10.1 (stuffed). •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

longirostris, Acipenser gueldenstaedtii var. Antipa [G.] 1909:262 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River; Black Sea. Original not seen. Treated by Kottelat as infrasubspecific. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

longirostris, Pseudoscaphirhynchus fedtschenkoi forma Berg [L. S.] 1905:37 [Izviestii Turkestanskago otdiela Russkago geograficheskago obschchestva v. 4; ref. 15338] Syr Darya River, Kazakhstan. Syntypes: ZIN 4528 (1, 225 mm), 11746 (1). Not available, regarded as infrasubspecific. Infrasubspecific. Acipenseridae.

lovetzkyi, Acipenser (Sterletus) Duméril [A. H. A.] 1870:254 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Syntypes: MNHN 0000-5171 (2). Type catalog: Bertin 1940:253 [ref. 293]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

lutescens, Accipenser Rafinesque [C. S.] 1820:246 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Old continent. No types known. Also in Rafinesque 1820:79 [ref. 3592]. Name only, not available. Correct spelling of genus is Acipenser. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae.

macrophthalmus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Not available, name only; also later as name in synonymy. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

macrorhinus, Acipenser (Huso) Duméril [A. H. A.] 1870:133 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MNHN 0000-9114. Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Smith 1986:49 [ref. 22186] as oxyrhynchus, Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

macrostomus, Accipenser Rafinesque [C. S.] 1820:249 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Lower parts of the Ohio River, U.S.A. No types known. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:81 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

maculosus, Acipenser Lesueur [C. A.] 1818:393 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Ohio River, U.S.A. Syntypes: ANSP (2). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Boschung & Mayden 2004:102 [ref. 27995]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

maeoticus, Acipenser Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoi rybokhozyaistvennoi biologicheskoi stantii Gruzii [Travaux de la Station piscicole et biologique de Géorgie] v. 1 (no. 1); ref. 21745] Sea of Azov. No types known. •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952], Birstein & Bemis 1997:159 [ref. 29760], see Sokolov 1998:23 [ref. 23571]). •Synonym of Huso huso (Linnaeus 1758), but a valid subspecies as described -- (Lelek 1987:55 [ref. 22962]). •Synonym of Acipenser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

major, Accipenser ruthenus Schöpf [J. D.] 1788:186 [Schriften der Berlinischen Gesellschaft Naturforschender Freunde v. 8; ref. 18700] Hudson River, New York, U.S.A. No types known. Genus should have been Acipenser. Not used as valid after 1899; therefore reversal of priority in favor of Acipenser oxyrinchus oxyrinchus Mitchill 1815. •In the synonymy of Acipenser oxyrinchus oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Nomen Oblitum. Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

mantschuricus, Acipenser Basilewsky [S.] 1855:235 [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 10; ref. 200] Amur River [China]. No types at ZIN. •Synonym of Huso dauricus (Georgi 1775) -- (Bogutskaya et al. 2008:313 [ref. 30085], Dyldin & Orlov 2016:546 [ref. 34656]). Current status: Synonym of Huso dauricus (Georgi 1775). Acipenseridae. Habitat: freshwater, brackish, marine.

marginatus, Accipenser Rafinesque [C. S.] 1820:247 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Also in Rafinesque 1820: [ref. 3592]. Not available, name only. Correct spelling of genus is Acipenser. Nomen Nudum. Acipenseridae.

marsiglii, Acipenser Brandt [J. F.] in Brandt & Ratzeburg 1833:352 [Medizinische Zoologie v. 2; ref. 619] Danube River or Ob River. Holotype: ?ZIN 11825. Based on Antaceus glaber of Marsigli 1726:34, Pl. 10 (fig. 2) [not investigated]. Also spelled marsilii by authors. •Synonym of Acipenser ruthenus Linnaeus 1758, but perhaps a valid subspecies -- (Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:21 [ref. 23571]). •Synonym of Acipenser ruthenus Linnaeus 1758, but a valid subspecies marsiglii -- (Sheiko & Fedorov 2000:16 [ref. 25650]). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Berg 1948:76 [ref. 12882], Kottelat 1997:31 [ref. 22952], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

measius, Acipenser Lesueur [C. A.] in Vaillant 1896:26 [12], Pl. 17 (unedited) [Bulletin de la Société philomathique de Paris (8th Série) v. 8 (no. 1); ref. 13482] No locality. On p. 12 of separate. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Hilton et al. 2011:11 [ref. 31407]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae.

medirostris, Acipenser Ayres [W. O.] 1854:2 [The Pacific [newspaper] v. 3 and 4 (thru no. 6); ref. 157] Near San Francisco, California, U.S.A. No types known. Appeared first as above on 1 Dec.; then in Ayres 1854:16 [ref. 18923]. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Valid as Acipenser medirostris Ayres 1854 -- (Berg 1948:95 [ref. 12882], Lee et al. 1980:40 [ref. 22416], Eschmeyer & Herald 1983:61 [ref. 9277], Nakaya in Masuda et al. 1984:18 [ref. 6441], Kawanabe & Mizuno 1989:42 [ref. 25598], McAllister 1990:42 [ref. 14674], Page & Burr 1991:26 [ref. 18983], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Kim 1997:142 [ref. 24032], Nikiforov et al. 1997:330 [ref. 24694], Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:159 [ref. 29760], Sokolov 1998:20 [ref. 23571], Scott & Crossman 1998:90 [ref. 24570], Sokolovskaya et al. 1998:7 [ref. 24670], Musick et al. 2000:10 [ref. 24959], Nakabo 2000:187 [ref. 25086], Zemnukhov et al. 2001:420 [ref. 25412], Sheiko & Fedorov 2000:16 [ref. 25650], Pietsch et al. 2001:138 [ref. 25688], Bogutskaya et al. 2001:42 [ref. 26178], Kim & Park 2002:40 [ref. 25913], Mecklenburg et al. 2002:114 [ref. 25968], Nakabo 2002:187 [ref. 26001], Choi et al. 2003:136, 487 [ref. 26218], Moyle 2002:109 [ref. 26449], Wydoski & Whitney 2003:39 [ref. 27816], Nelson et al. 2004:58 [ref. 27807], Bogutskaya & Naseka 2004:23 [ref. 28183], Love et al. 2005:15 [ref. 37547], Scharpf 2005:7 [ref. 28940], McPhail 2007:24 [ref. 31199], Page & Burr 2011:135 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Pietsch & Orr 2015:18 [ref. 34694], Kells et al. 2016:88 [ref. 35888], Burton & Lea 2019:34 [ref. 37205], Dyldin et al. 2020:79 [ref. 37569], Love et al. 2021:30 [ref. 39279], Dyldin et al. 2022:[9] [ref. 39193], Page et al. 2023:48 [ref. 40505], Fricke et al. 2024:107 [ref. 41622]). Current status: Valid as Acipenser medirostris Ayres 1854. Acipenseridae. Distribution: North Pacific: eastern Kamchatka (Russia), Bering Sea and Alaska (U.S.A.) south to Pacific coast of northern Baja California (Mexico). Habitat: freshwater, brackish, marine.

medius, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:293 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name in the synonymy of Acipenser schypa, not available; also appeared in later literature. •Questionably in the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

megalaspis, Acipenser (Huso) Duméril [A. H. A.] 1870:135 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Lake Champlain at Burlington, Vermont, U.S.A. Holotype (unique) (?): MCZ 8953. This name was misspelled as megalepis in earlier versions of the Catalog of Fishes. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

mexicanus, Scaphirhynchus Giltay [L.] 1928:28, Figs. 1-2 [Annales de la Société Royale Zoologique de Belgique v. 59; ref. 15848] Mexico. Holotype (unique): IRSNB 32 (mounted skin). Type catalog: Walschaerts 1987:7 [ref. 20755]. •Synonym of Scaphirhynchus platorynchus (Rafinesque 1820). Current status: Synonym of Scaphirhynchus platorynchus (Rafinesque 1820). Acipenseridae. Habitat: freshwater, brackish, marine.

microrhynchus, Acipenser (Huso) Duméril [A. H. A.] 1870:164 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Port of New York, New York, U.S.A. Holotype (unique): MCZ (whereabouts unknown). •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae. Habitat: freshwater, brackish, marine.

mikadoi, Acipenser Hilgendorf [F. M.] 1892:98 [Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin 1892; ref. 14511] Hokaido, Japan. No types known. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Sometimes considered a subspecies of Acipenser medirostris Ayres 1854 -- (Reshetnikov et al. 1997:725 [ref. 24702]). •Synonym of Acipenser medirostris Ayres 1854 -- (Kim 1997:539 [ref. 24032], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:24 [ref. 28183]). •Valid as Acipenser mikadoi Hilgendorf 1892 -- (Birstein & Bemis 1997:159 [ref. 29760], Mecklenburg et al. 2002:114 [ref. 25968], Bogutskaya et al. 2008:313 [ref. 30085], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:42 [ref. 33547], Pietsch & Orr 2015:18 [ref. 34694], Dyldin & Orlov 2016:545 [ref. 34656], Dyldin et al. 2020:79, 102 [ref. 37569], Dyldin et al. 2021:16 [ref. 38804], Dyldin & Orlov 2021:60 [ref. 38158], Dyldin et al. 2022:[10] [ref. 39193]). Current status: Valid as Acipenser mikadoi Hilgendorf 1892. Acipenseridae. Distribution: Northwestern Pacific Ocean: southern Okhotsk Sea and Japan to Korea. Habitat: freshwater, brackish, marine.

milberti, Acipenser (Huso) Duméril [A. H. A.] 1870:137 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Syntypes: MNHN 0000-3113 (1, mounted), 0000-3494 (1, mounted). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (authors). •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Smith 1986:49 [ref. 22186] as oxyrhynchus, Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

mitchillii, Acipenser (Huso) Duméril [A. H. A.] 1870:116 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] New York, U.S.A. Holotype (unique): MNHN 0000-4578. Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Smith 1986:48 [ref. 22186] as oxyrhynchus, Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Habitat: freshwater, brackish, marine.

multiscutatus, Acipenser Tanaka [S.] 1908:21, Pl. 2 (fig. 1) [Journal of the College of Science. Imperial University, Tokyo v. 23 (art. 7); ref. 6032] 7 miles off Ukedohama, Iwaki Province, Japan. Holotype: ZUMT 955 (stuffed, lost). Paratypes: ZUMT (2, skins, lost). Type catalog: Aizawa et al. 2022:215 [ref. 39648]. •Valid as Acipenser multiscutatus Tanaka 1908 -- (Okada 1961:280 [ref. 6363], Nakaya in Masuda et al. 1984:18 [ref. 6441]). •Synonym of Acipenser schrenckii Brandt 1869 -- (Birstein & Bemis 1997:159 [ref. 29760] with question, Dyldin & Orlov 2016:546 [ref. 34656]). Current status: Synonym of Acipenser schrenckii Brandt 1869. Acipenseridae. Habitat: freshwater, brackish, marine.

muricatus, Accipenser Rafinesque [C. S.] 1820:246 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Also in Rafinesque 1820:79 [ref. 3592]. Not available, name only. Correct spelling of genus is Acipenser. Nomen Nudum. Acipenseridae.

naccarii, Acipenser Bonaparte [C. L.] 1836:fasc. 16-17, punt.87, Pl. 129 (fig. 2) [Iconografia della fauna italica; ref. 4892] Rivers Brenta, Adige, Piave, Livenza, Bacchiglione, Tagliamento; Florence, Italy. Syntypes: ANSP 624 (1), 625 (1) Bonaparte no. 72. Type catalog: Böhlke 1984:17 [ref. 13621]. Name declared a nomen protectum by Kottelat & Freyhof 2009:76 [ref. 30320] to establish precedence over Acipenser heckelii Bonaparte 1836. •Valid as Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Svetovidov in Whitehead et al. 1984:222 [ref. 13675], Lelek 1987:25 [ref. 22962], Artyukhin 1995:7 [ref. 23782], Mrakovcic et al. 1995:183 [ref. 23079], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:24 [ref. 28183], Kottelat & Freyhof 2007:52 [ref. 29996], Kottelat & Freyhof 2009:76 [ref. 30320], Lipej & Dulčić 2010:16 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Ćaleta et al. 2015:45 [ref. 34877], Barbieri et al. 2015:35 [ref. 35029], Nión et al. 2016:24 [ref. 35565] as nacarii and date 1838, Ćaleta et al. 2019:143 [ref. 37026], Carneiro et al. 2019:55 [ref. 37250], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:97 [ref. 37569], Kovačić et al. 2020:9 [ref. 37519], Kovačić et al. 2021:18 [ref. 39014], Shumka et al. 2023:36 [ref. 40747]). Current status: Valid as Acipenser naccarii Bonaparte 1836. Acipenseridae. Distribution: Mediterranean Sea: Adriatic Sea and its tributaries, Italy, Slovenia, Greece (extinct), Croatia, Montenegro and Albania; adjacent northeastern Atlantic: Portugal (extinct); introduced in Russia. Habitat: freshwater, brackish, marine.

nardoi, Acipenser Heckel [J. J.] 1851:557, Pl. 24 (fig. 2) [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 6 (pt 2); ref. 18261] Venice, Italy, Adriatic Sea (Mediterranean Sea). Holotype: ?NMW 63076. Non-types: ?NMW 63079 (1). •Synonym of Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952]). Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae. Habitat: freshwater, brackish, marine.

nasus, Acipenser Heckel [J. J.] 1847:80 [Diario del Nono Congresso degli Scienziati Italiani convocati in Venezia; ref. 26437] Venice, Italy, Adriatic Sea (Mediterranean Sea). Holotype (unique): NMW 63093. Also appeared in Heckel 1851:552 [ref. 18261], Pl. 23. •Synonym of Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Kottelat 1997:31 [ref. 22952]). Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae. Habitat: freshwater, brackish, marine.

nehelae, Acipenser (Huso) Duméril [A. H. A.] 1870:100, Pl. 20 (figs. 6, 6a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Russia. Holotype (unique): MNHN 0000-4637. Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

nertinianus, Acipenser (Huso) Duméril [A. H. A.] 1870:162 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Homer, Michigan, U.S.A. Holotype (unique): MCZ 24032. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

nudiventris, Acipenser Lovetsky [A.] 1828:78, Pl. 6 (fig. 2) [Novyi Magazin, Estestvennoi Istorii, Fiziki, Khimii i Svedenii i Svedenii Ekologicheskikh, Izdannyi 1. Dviubskim v. 1 (no. 2); ref. 19627] Aral Sea, Russia. No types known. Apparently also appeared in Lovetsky 1830 [ref. 18454]. Original description reproduced in Berg 1905:2, footnote [ref. 15338]. •Valid as Acipenser nudiventris Lovetsky 1828 -- (Berg 1948:66 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Coad 1981:8 [ref. 22348], Svetovidov in Whitehead et al. 1984:222 [ref. 13675], Lelek 1987:48 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:31 [ref. 22952], Reshetnikov et al. 1997:725 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:21 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:37 [ref. 26586] dated 1928 [sic], Bilecenoğlu et al. 2002:29 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:24 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369] with date as 1928, Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:53 [ref. 29996], Vasil'eva 2007:38 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:43 [ref. 33547], Çiçek et al. 2015:142 [ref. 35151], Zhang et al. 2016:45 [ref. 34477], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:15 [ref. 37983], Kuljanishvili et al. 2020:[4] [ref. 37535], Dyldin et al. 2022:[10] [ref. 39193], Çiçek et al. 2023:8 [ref. 40326], Çiçek et al. 2023:329 [ref. 40625], Çiçek et al. 2024:28 [ref. 40789]). Current status: Valid as Acipenser nudiventris Lovetsky 1828. Acipenseridae. Distribution: Eastern Atlantic, Europe and Middle East: Basins of Black, Azov, Caspian and Aral seas and Sea of Marmara. Habitat: freshwater, brackish, marine.

obensis, Acipenser baeri infra. Johansen [B. G.] 1945:1 [Tomskoe Otdelenie Moskovskago Obscestva Ispytatelej Priody. Tomsk No. 6; ref. 19603] Ob River, at 59.5°N, Russia. Syntypes: (21) not saved. Apparently infrasubspecific and not available. Infrasubspecific. Acipenseridae.

obstusirostris, Acipenser ruthenus form Roussow [G.] 1955:79 [Annales de l'ACFAS v. 21 (Section 3, Biologie) (for 1953-1954); ref. 26406] Not available; infrasubspecific. •Wrongly treated as a subspecies of [in the synonymy of] Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Infrasubspecific. Acipenseridae.

obtusirostra, Acipenser ruthenus var. Brusina [S.] 1902:66 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Una River, Croatia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

obtusirostris, Acipenser Lovetsky [A.] 1834:257 [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Not available, name only. Name attributed to Le Sueur. •In the synonymy of Acipenser brevirostrum Lesueur 1818 -- (Hilton et al. 2011:11 [ref. 31407]). Nomen Nudum. Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae.

occidentalis, Huso huso ponticus natio Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoi rybokhozyaistvennoi biologicheskoi stantii Gruzii [Travaux de la Station piscicole et biologique de Géorgie] v. 1 (no. 1); ref. 21745] Not available, infrasubspecific; from w. part of the Black Sea. •In the synonymy of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952]). •Valid as Aciperser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547]). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae.

ohiensis, Accipenser Rafinesque [C. S.] 1820:248 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Ohio River, U.S.A. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:81 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

oligopeltis, Acipenser (Antaceus) Duméril [A. H. A.] 1867:184, Pl. 15 (figs. 2, 2a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:241 [ref. 1147]. •Synonym of Acipenser acutirostris Ayres 1854 -- (Okada 1961:282 [ref. 6363]). •Synonym of Acipenser medirostris Ayres 1854. Current status: Synonym of Acipenser medirostris Ayres 1854. Acipenseridae. Habitat: freshwater, brackish, marine.

orientalis, Acipenser Pallas [P. S.] 1814:107 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Amur River, Schilkam and Argunum, along Pacific. No types known. •Synonym of Acipenser dauricus George 1775 -- (Parin et al. 2014:41 [ref. 33547]). •Synonym of Huso dauricus (Georgi 1775) -- (Berg 1948:58 [ref. 12882], Bogutskaya & Naseka 1996:11 [ref. 22798], Sokolov 1998:23 [ref. 23571], Bogutskaya et al. 2008:313 [ref. 30085], Dyldin & Orlov 2016:546 [ref. 34656]). Current status: Synonym of Huso dauricus (Georgi 1775). Acipenseridae. Habitat: freshwater, brackish, marine.

orientalis, Huso huso Lelek [A.] 1987:55 [The freshwater fishes of Europe. Threatened fishes of Europe v. 9; ref. 22962] Black Sea. Validates a name that first appeared as an infrasubspecific name; see Huso huso ponticus natio orientalis. But subjectively invalid; secondarily preoccupied in Huso by Acipenser orientalis Pallas 1814. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

orientalis, Huso huso ponticus natio Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoi rybokhozyaistvennoi biologicheskoi stantii Gruzii [Travaux de la Station piscicole et biologique de Géorgie] v. 1 (no. 1); ref. 21745] Not available, infrasubspecific; from the Black Sea. •In the synonymy of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952]). •Treated as available from Lelek 1987:55 [ref. 22962] by reference to above. •In the synonymy of Acipenser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547] not available). Infrasubspecific. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae.

oxyrinchus, Acipenser Mitchill [S. L.] 1815:462 [Transactions of the Literary and Philosophical Society of New-York v. 1 (art. 5) (for 1814); ref. 13292] New York, U.S.A. No types known. Commonly misspelled; oxyrinchus is the correct spelling. Declared a nomen protectum by Kottelat & Freyhof 2009:75 [ref. 30320] on Art. 23.9.1 for reversal of precedence over Stureo accipenser Strøm 1784 and Acipenser lichtensteinii Bloch & Schneider 1801. •Valid as Acipenser oxyrinchus Mitchell 1815, subspecies oxyrinchus Mitchell 1815 -- (Ross et al. 2001:76 [ref. 25978], Musick in Collette & Klein-MacPhee 2002:85 [ref. 26158], Boschung & Mayden 2004:105 [ref. 27995], Scharpf 2005:7 [ref. 28940], Miller 2006:81 [ref. 28615], Kottelat & Freyhof 2009:78 [ref. 30320], Mecklenburg et al. 2011:117 [ref. 31212], Page & Burr 2011:137 [ref. 31215] with 2 subspecies, Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:43 [ref. 33547], Hilton et al. 2016:30 [ref. 35294]). •Valid as Acipenser oxyrinchus Mitchill 1815 -- (Herrera 1896:16 [ref. 39336] as oxyrhynchus, Backus 1951:290 [ref. 41140] as oxyrhynchus, Lee et al. 1980:41 [ref. 22416], Smith 1986:47 [ref. 22186], Robins & Ray 1986:44 [ref. 23100], Scott & Scott 1988:68 [ref. 25518], McAllister 1990:42 [ref. 14674], Burkhead & Jenkins 1991:344 [ref. 21804], Page & Burr 1991:27 [ref. 18983], Boschung 1992:28 [ref. 23239], Musick et al. in Jenkins & Burkhead 1994:187 [ref. 21581], Knight & Hastings 1994:149 [ref. 25560], Artyukhin 1995:7 [ref. 23782], Ong et al. 1996:464 [ref. 23959], Chereshnev 1996:599 [ref. 24659], Bemis et al. 1997:37 [ref. 22871], Murdy et al. 1997:53 [ref. 23144], Birstein & Bemis 1997:159 [ref. 29760], McEachran & Fechhelm 1998:198 [ref. 23897], Scott & Crossman 1998:92 [ref. 24570], Smith-Vaniz et al. 1999:125 [ref. 25013], Musick et al. 2000:10 [ref. 24959], Scott 2003:671 [ref. 26987], Nelson et al. 2004:58 [ref. 27807], Fricke 2007:25 [ref. 30577], Kottelat & Freyhof 2007:53 [ref. 29996], Page et al. 2013:58 [ref. 32708], Robins et al. 2018:43 [ref. 35886], Dyldin et al. 2020:97 [ref. 37569], Dyldin et al. 2022:[10] [ref. 39193], Simian et al. 2022:374 [ref. 40776], Page et al. 2023:49 [ref. 40505]). Nomen Protectum. Current status: Valid as Acipenser oxyrinchus Mitchill 1815. Acipenseridae. Distribution: Baltic Sea basin; western Atlantic: Labrador (Canada) south to southeastern South America; introduced in Russia. Habitat: freshwater, brackish, marine.

paranasimos, Acipenser (Huso) Duméril [A. H. A.] 1870:124 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Huntsville, Alabama, U.S.A. Holotype (unique): MCZ 8948. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Boschung & Mayden 2004:102 [ref. 27995]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

persicus, Acipenser Borodin [N. A.] 1897:18, Figs. [Vestnik Rybopromyshlennosti St. Petersburg v. 12; ref. 19955] Ural River to Ural'sk, Kazakhstan; Kura River, Azerbijan; southern shore of Caspian Sea, Iran. Syntypes: (2 measured) none at ZIN. •Synonym of Acipenser gueldenstaedti Brandt & Ratzeberg 1833, but a valid subspecies -- (Berg 1948:81 [ref. 12882], Lelek 1987:50 [ref. 22962], see also Sokolov 1998:19 [ref. 23571], Ninua & Japoshvili 2008:164 [ref. 31251]). •Valid as Acipenser persicus Borodin 1897 -- (Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:24 [ref. 28183], Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:55 [ref. 29996], Kottelat & Freyhof 2007:55 [ref. 29996], Vasil'eva 2007:38 [ref. 30517], Ruban et al. 2011:470 [ref. 31229], Esmaeili et al. 2010:365 [ref. 33391], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:43 [ref. 33547], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:143 [ref. 35151], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79 [ref. 37569], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Kaya et al. 2020:328 [ref. 37582], Kuljanishvili et al. 2020:[4] [ref. 37535], Dyldin et al. 2022:[10] [ref. 39193], Çiçek et al. 2024:29 [ref. 40789]). Current status: Valid as Acipenser persicus Borodin 1897. Acipenseridae. Distribution: Eastern Atlantic, Europe and Middle east: Caspian Sea and adjacent watersheds; introduced elsewhere. Habitat: freshwater, brackish.

platorynchus, Accipenser Rafinesque [C. S.] 1820:247 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Ohio, Wabash and Cumberland rivers, U.S.A. No types known. Described as belonging to subgenus Sturio, but listed as above. Also in Rafinesque 1820:80 [ref. 3592]. Correct spelling of genus is Acipenser. •Valid as Scaphirhynchus platorynchus (Rafinesque 1820) -- (Lee et al. 1980:44 [ref. 22416], Robison & Buchanan 1988:80 [ref. 23393], Tomelleri & Eberle 1990:12 [ref. 24089], Page & Burr 1991:27 [ref. 18983], Williams & Clemmer 1991:23 [ref. 19118], Boschung 1992:29 [ref. 23239], Espinosa Pérez et al. 1993:7 [ref. 22290], Etnier & Starnes 1993:102 [ref. 22809], Baxter & Stone 1995:44 [ref. 23374], Stauffer et al. 1995:31 [ref. 23376], Cross & Collins 1995:25 [ref. 23394], Mayden & Kuhajda 1996:260 [ref. 22395], Mettee et al. 1996:81 [ref. 25836], Bemis et al. 1997:37 [ref. 22871], Lyons et al. 2000:20 [ref. 26594] as platorhynchus, Ross et al. 2001:77 [ref. 25978], Nelson et al. 2004:58 [ref. 27807], Miller & Robison 2004:48 [ref. 27931], Boschung & Mayden 2004:107 [ref. 27995], Scharpf 2005:7 [ref. 28940], Miller 2006:82 [ref. 28615], Page & Burr 2011:138 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Bagley et al. 2023:312 [ref. 41241], Page et al. 2023:49 [ref. 40505], Fricke et al. 2024:107 [ref. 41622]). Current status: Valid as Scaphirhynchus platorynchus (Rafinesque 1820). Acipenseridae. Distribution: North America: large rivers, United States south to Rio Grande/Rio Bravo system (U.S.A., Mexico). Habitat: freshwater.

platycephalus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:304 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Name in the synonymy of Acipenser heckelii Fitzinger 1836, not available; also appeared in other literature as name only or name in synonymy. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae.

platyrhincho, Accipenser Rafinesque [C. S.] 1818:354 [American Monthly Magazine and Critical Review v. 3 (no. 5) (art. 3) (Sept.); ref. 3586] Not available, name only; genus name should have been Acipenser. Nomen Nudum. Acipenseridae.

platyrhinus, Acipenser (Huso) Duméril [A. H. A.] 1870:154 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-5007 (mounted). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (authors). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

podapos, Acipenser (Huso) Duméril [A. H. A.] 1870:102 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Locality unknown [Europe]. Syntypes: MNHN 0000-4636 (2). Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

ponticus, Acipenser stellatus Movchan [Yu. V.] 1970:41 [Vestnik Zoologii v. 1970 (no. 2); ref. 895] Northwestern Black Sea, including Danube and Dneiper rivers. Syntypes: (many) whereabouts unknown. •Synonym of Huso huso (Linnaeus 1758) -- (see Sokolov 1998:23 [ref. 23571]). •Synonym of Acipenser stellatus Pallas 1771 -- (Parin et al. 2014:45 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

ponticus, Huso huso Sal'nikov [N. I.] & Malyatskii [S. M.] 1934:44 [Trudy Nauchnoi rybokhozyaistvennoi biologicheskoi stantii Gruzii [Travaux de la Station piscicole et biologique de Géorgie] v. 1 (no. 1); ref. 21745] Black Sea. No types known. •Synonym of Aciperser huso Linnaeus 1758 -- (Parin et al. 2014:42 [ref. 33547]). •Synonym of Huso huso (Linnaeus 1758) -- (Berg 1948:61 [ref. 12882], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

primigenius, Acipenser Chalikov [B. G.] 1944:47 [Zoologicheskii Zhurnal v. 23 (no. 1); ref. 13170] Northern Caspian Sea. No types known. •Hybrid of Acipenser ruthenus x Acipenser gueldenstaedti -- (Berg 1948:77 [ref. 12882], Kottelat 1997:183 [ref. 22952], Çiçek et al. 2024:29 [ref. 40789]). Hybrid. Current status: Synonym of Acipenser. Acipenseridae. Habitat: freshwater, brackish, marine.

putnami, Acipenser (Antaceus) Duméril [A. H. A.] 1867:178, Pl. 13 (figs. 1, 1a-b) [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] San Francisco, California, U.S.A. Holotype (unique): MCZ (whereabouts unknown). Also appeared in Duméril 1870:243, Pl. 18 (figs. 2, 2a-b) [ref. 1147]. •Synonym of Acipenser transmontanus Richardson 1836. Current status: Synonym of Acipenser transmontanus Richardson 1836. Acipenseridae. Habitat: freshwater.

pygmaeus, Acipenser Pallas [P. S.] 1814:102 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Major seas and rivers of Europe. No types known. For localities see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Sokolov 1998:21 [ref. 23571], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

pygmaeus, Acipenser Reisinger [J.] 1830:93 [Specimen ichthyologiae sistens pisces aquarium dulcium Hungariae; ref. 18620] Objectively invalid; preoccupied by Acipenser pygmaeus Pallas 1814. •Synonym of Acipenser gueldenstaedtii Brant & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). 1°Homonym. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

rafinesquii, Acipenser (Huso) Duméril [A. H. A.] 1870:143 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Ohio River, U.S.A. Holotype (unique): MCZ 8950. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

rafinesquii, Scaphirhynchus Heckel [J. J.] 1836:72, Pl. 8 [Annalen des Wiener Museums der Naturgeschichte v. 1; ref. 2062] Ohio, Wabash, and Cumberland rivers, U.S.A. Syntypes: (3) NMW 63271 (2). Unneeded new name for Accipenser platorynchus Rafinesque 1820. •Synonym of Scaphirhynchus platorynchus (Rafinesque 1820). Current status: Synonym of Scaphirhynchus platorynchus (Rafinesque 1820). Acipenseridae. Habitat: freshwater.

ratzeburgii, Acipenser Brandt [J. F.] in Brandt & Ratzeburg 1833:351, 352, Pl. 1a (fig. 3) [Medizinische Zoologie v. 2; ref. 619] Caspian Sea at mouth of Emba River. Holotype: ZIN 11760. •Synonym of Acipenser stellatus Pallas 1771 -- (Coad 1995:7 [ref. 23608], Kottelat 1997:33 [ref. 22952], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Çiçek et al. 2024:30 [ref. 40789]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

rauchii, Acipenser (Huso) Duméril [A. H. A.] 1870:118 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Osage River, Missouri, U.S.A. Holotype (unique): MCZ 8946. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

rhynchaeus, Acipenser Agassiz [L.] 1850:276 [Lake Superior; ref. 66] Sault Sainte Marie, Lake Superior, North America. Syntypes: whereabouts unknown. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

richardsonii, Acipenser (Huso) Duméril [A. H. A.] 1870:120 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River, U.S.A. Holotype (unique): MNHN 0000-9113 (dry). Type catalog: Bertin 1940:250 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (authors). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

rosarium, Acipenser (Huso) Duméril [A. H. A.] 1870:152, Pl. 17 (figs. 2, 2a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Upper Mississippi River or Lake Erie, U.S.A. Holotype (unique): MNHN 0000-5009 (dry). Type catalog: Bertin 1940:251 [ref. 293]. •Synonym of Acipenser rubicundus Lesueur 1818 -- (authors). •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

rossikowi, Pseudoscaphirhynchus Nikolskii [A. M.] 1900:258 [Ezhegodnik, Zoologicheskogo Muzeya, Sankt-Petersburg v. 5; ref. 3202] Lower Amu Darya, Uzbekistan. Holotype (unique): ZIN 11526. •Synonym of Pseudoscaphirhynchus hermanni (Kessler 1877) -- (Berg 1948:105 [ref. 12882]). Current status: Synonym of Pseudoscaphirhynchus hermanni (Kessler 1877). Acipenseridae. Habitat: freshwater, brackish.

rostellum, Acipenser (Huso) Duméril [A. H. A.] 1870:173, Pl. 16 (figs. 3, 3a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Probably New York, U.S.A. Holotype (unique): MNHN 0000-3490. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407], Kynard et al. 2016:209 [ref. 35295]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae. Habitat: freshwater, brackish, marine.

rostratus, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:287, 298 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Treated by Kottelat as dating to Brandt & Ratzeburg 1833, as name in synonymy and not available. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

rostratus, Acipenser Brandt [J. F.] & Ratzeburg [J. T. C.] 1833:29 [Medizinische Zoologie v. 2; ref. 619] No description, not available. •In the synonymy of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:33 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

rubicundus, Acipenser Lesueur [C. A.] 1818:388, Pl. 12 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Lakes Ontario, Erie, Huron and Michigan, North America. No types known. Redescribed and illustrated by Lesueur 1827:9, Pl. 5 [ref. 17524] with genus as Accipenser. •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Smith 1986:47 [ref. 22186], Scott & Crossman 1998:89 [ref. 24570], Boschung & Mayden 2004:102 [ref. 27995]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

rupertianus, Acipenser Richardson [J.] 1836:311, Pl. 97 (fig. 1) [Fauna Boreali-Americana Part 3; ref. 3731] Albany River, Prince Rupert's Land, Canada. Syntypes: (2) whereabouts unknown •Synonym of Acipenser fulvescens Rafinesque 1817 -- (Scott & Crossman 1998:89 [ref. 24570]). Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

ruthenicus, Acipenser Brusina [S.] 1902:63 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Not available, name in synonymy. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

ruthenus, Acipenser Linnaeus [C.] 1758:237 [Systema Naturae, Ed. X v. 1; ref. 2787] ?Danube River. Holotype: NRM 96. Based on several sources, see Kottelat 1997:31 [ref. 22952] so 96 should be regarded as a syntype. Apparently ruthenicus Brusina 1902:63 is a misspelling. Species epithet spelled rhutenus by Kielsen 1835:iii [ref. 30365]. •Valid as Acipenser ruthenus Linnaeus 1758 -- (Herrera 1896:16 [ref. 39336], Berg 1948:70 [ref. 12882], Lelek 1987:51 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Sokolov & Tsepkin 1996:23 [ref. 24640], Chereshnev 1996:599 [ref. 24659], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:31 [ref. 22952], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:21 [ref. 23571], Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:29 [ref. 26586], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:24 [ref. 28183], Hanel & Lusk 2005:176 [ref. 28804], Fricke et al. 2007:21 [ref. 29533], Kottelat & Freyhof 2007:55 [ref. 29996], Esmaeili et al. 2010:365 [ref. 33391], Mecklenburg et al. 2011:117 [ref. 31212], Ruban et al. 2011:471 [ref. 31229], Hilton et al. 2011:136 [ref. 31407], Dolgov 2013:915 [ref. 33112], Parin et al. 2014:44 [ref. 33547], Litz & Koerber 2014:5 [ref. 33622], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:143 [ref. 35151], Zhang et al. 2016:45 [ref. 34477], Nión et al. 2016:24 [ref. 35565], Esmaeili et al. 2017:25 [ref. 35254], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:36 [ref. 41055], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:102 [ref. 37569], Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Dyldin et al. 2022:[11] [ref. 39193], Pozdeev et al. 2022:4 [ref. 39511], Nagy et al. 2023:356 [ref. 40348], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:29 [ref. 40789]). Current status: Valid as Acipenser ruthenus Linnaeus 1758. Acipenseridae. Distribution: Arctic rivers; Europe and Middle East: Sea of Marmara, Black Sea, Sea of Azov, White Sea and Caspian Sea watersheds. Introduced elsewhere. Habitat: freshwater, brackish.

rutzskyi, Acipenser ruthenus Johansen [B. G.] 1946:171 [Trudy Tomskogo Gosudarstvennogo Universiteta v. 97; ref. 19607] Upper Ob River, Siberia, Russia. Syntypes: (21). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] as ruzskyi, Sokolov 1998:21 [ref. 23571] as ruzskyi, Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

schip, Acipenser Eichwald [C. E. von] 1841:172 [Fauna Caspio-Caucasia; ref. 1210] Apparently not an original description, as A. schip Pall. = Schiph Pallas, Reis. Russ. Reich., l, l77l, 248, Ural River. Acipenseridae.

schipa, Acipenser Lovetsky [A.] 1834:260, Pl. 17 (figs. 3-4) [Nouveaux mémoires de la Société impériale des naturalistes de Moscou v. 3; ref. 18085] Possibly the same as Acipenser schypa Gmelin 1789. Acipenseridae.

schrenckii, Acipenser Brandt [J. F.] 1869:115 [Mélanges biologiques v. 7; ref. 618] Amur River and its main tributaries, Russia. Syntypes: whereabouts unknown. For remarks on systematics see Kottelat 2006:15 [ref. 28831]. •Valid as Acipenser schrenckii [often as schrencki] Brandt 1869 -- (Berg 1948:91 [ref. 12882], Nakaya in Masuda et al. 1984:18 [ref. 6441], Artyukhin 1995:7 [ref. 23782], Artyukin 1995:7 [ref. 23782], Zhu 1995:5 [ref. 25213], Bogutskaya & Naseka 1996:11 [ref. 22798], Bemis et al. 1997:37 [ref. 22871], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760] as schrencki, Sokolov 1998:22 [ref. 23571], Yue & Chen 1998:6 [ref. 26415], Bogutskaya et al. 2001:42 [ref. 26178], Zhang 2001:32 [ref. 26586], Bogutskaya & Naseka 2004:25 [ref. 28183] as schrenckii, Kottelat 2006:15 [ref. 28831], Ocock et al. 2006:27 [ref. 28933] as schrenkii, Bogutskaya et al. 2008:313 [ref. 30085], Hilton et al. 2011:136 [ref. 31407] as schrenkii, Parin et al. 2014:44 [ref. 33547] as schrenckii, Zhang et al. 2016:45 [ref. 34477] as schrenckii, Dyldin & Orlov 2016:546 [ref. 34656], Dyldin et al. 2020:79, 102 [ref. 37569], Dyldin et al. 2021:16 [ref. 38804], Dyldin & Orlov 2021:60 [ref. 38158], Dyldin et al. 2022:[11] [ref. 39193]). Current status: Valid as Acipenser schrenckii Brandt 1869. Acipenseridae. Distribution: Northwestern Pacific: Amur River basin, Sea of Japan and Sea of Okhotsk (China, Russia and Mongolia). Habitat: freshwater, brackish, marine.

schypa, Acipenser Gmelin [J. F.] 1789:1484 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Neotype designated by Kottelat 1997:34 [ref. 22952]. Based in part on Acipenser schypa Güldenstädt 1772:516 [ref. 5066], and on Acipenser kostera of Gmelin 1774:238 [ref. 18140, v. 3]. Objectively invalid; preoccupied by Acipenser schypa Bonnaterre 1788. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). 1°Homonym. Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

schypa, Acipenser Bonnaterre [J. P.] (ex Güldenstädt) 1788:16 [Tableau encyclopédique et méthodique des trois règnes de la nature... Ichthyologie; ref. 4940] 'La mer du Nord' (erroneous, is probably Caspian Sea). Neotype: NRM 8946. Neotype designated (NRM 8946) by Kottelat 1997:34 [ref. 22952] is invalid, as the neotype is a specimen of Huso huso (Linnaeus 1758), but Bonnaterre's Acipenser schypa was exclusively based on Acipenser schypa Güldenstädt 1772:516 [ref. 5066], which is in the synonymy of Acipenser nudiventris Lovetsky 1828 according to Kottelat 1997:31 [ref. 22952]; therefore ICZN Art. 75.3.5 is not met. Name not considered as valid after 1899; therefore reversal of priority in favor of Acipenser nudiventris Lovetsky 1828 is followed (Art. 23.9). •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). Nomen Oblitum. Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae. Habitat: freshwater, brackish, marine.

schypa, Acipenser Eichwald [C. E. von] 1831:66 [Zoologia specialis quam expositis animalibus tum vivis Pars posterior [3]; ref. 5562] Caspian Sea, unde Volga adscendit et Cyrum. Credited to "L." [Linnaeus] but this species not described by Linnaeus; if regarded as available then it is subjectively invalid -- preoccupied by Acipenser schypa Güldenstädt 1772. •Synonym of Acipenser nudiventris Lovetsky 1828 -- (Svetovidov 1973:83 [ref. 7169], Coad 1995:7 [ref. 23608] as shypa, Jouladeh-Roudbar et al. 2020:15 [ref. 37983]). Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae. Habitat: freshwater, brackish, marine.

schypa, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Not available, non-binominal, see Kottelat 1997:31 [ref. 22952]. Name made available by Bonnaterre 1788:16 [ref. 4940]. Also seen as Acipenser schipa Güldenstädt 1772. •In the synonymy of Acipenser nudiventris Lovetsky 1828 -- (Kottelat 1997:31 [ref. 22952], Parin et al. 2014:43 [ref. 33547]). Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae.

scobar, Acipense gueldenstaedtii var. Antipa [G.] 1909:260 [Publicatiuniule fondului Vasilie Adamachi, Academia Româna [Fauna ichtiologica a romaniei, de dr. Gr. Antipa]. v. 3 (no. 16); ref. 15922] Danube River. Original not seen. The original genus should have been Acipenser. Treated by Kottelat 1997 as infrasubspecific and not available. •In the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952] as scobar). Infrasubspecific. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

sebae, Acipenser Duméril [A. H. A.] (ex Valenciennes) 1870:188 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] No locality. Holotype (unique): whereabouts unknown. Acipenseridae.

septemcarinata, Acipenser ruthenus var. Brusina [S.] 1902:66 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Treated by Kottelat 1997:32 [ref. 22952] as infrasubspecific and unavailable; from Una River, Croatia. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952]). Infrasubspecific. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

serotimus, Accipenser Rafinesque [C. S.] 1820:248 [Western Review and Miscellaneous Magazine: a monthly publ., devoted to literature and science, Lexington, KY v. 3 (no. 4); ref. 5088] Ohio and Kentucky rivers, U.S.A. Described as belonging to subgenus Sterletus, but listed as above. Also in Rafinesque 1820:80 [ref. 3592]. Correct spelling of genus is Acipenser. •Synonym of Acipenser fulvescens Rafinesque 1817. Current status: Synonym of Acipenser fulvescens Rafinesque 1817. Acipenseridae. Habitat: freshwater, brackish.

seuruga, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Caspian Sea. No types known. Also in Bonnaterre 1788:17 [ref. 4940]. •Synonym of Acipenser stellatus Pallas 1771 -- (Kottelat 1997:32 [ref. 22952], Sokolov 1998:22 [ref. 23571], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Çiçek et al. 2024:30 [ref. 40789]). Current status: Synonym of Acipenser stellatus Pallas 1771. Acipenseridae. Habitat: freshwater, brackish, marine.

shyp, Acipenser Forster [J. R.] 1767:353 [Philosophical Transactions of the Royal Society of London v. 57 (art. 33); ref. 18088] Turkey, Bosphore or Sea of Marmara (Mediterranean Sea). Neotype: NRM 8946. Originally described from Volga River, Russia. Neotype designated by Kottelat 1997:34 [ref. 22952]. •Synonym of Huso huso (Linnaeus 1758) -- (Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983], Çiçek et al. 2024:31 [ref. 40789]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

sibiricus, Sterledus ruthenus var. Dybowski [B. N.] 1874:394 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 24 (no. 3-4); ref. 1172] Middle and lower Angara River, Siberia, Russia. Syntypes: whereabouts unknown. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.

simus, Acipenser (Huso) Duméril [A. H. A.] (ex Valenciennes) 1870:175, Pl. 16 (figs. 2, 2a) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] North America. Holotype (unique): MNHN 0000-3491. Type catalog: Bertin 1940:252 [ref. 293]. •Synonym of Acipenser brevirostrum Lesueur 1818 -- (Smith 1986:45 [ref. 22186], Hilton et al. 2011:11 [ref. 31407] as Valenciennes in Duméril, Kynard et al. 2016:209 [ref. 35295]). Current status: Synonym of Acipenser brevirostrum Lesueur 1818. Acipenseridae. Habitat: freshwater, brackish, marine.

sinensis, Acipenser Gray [J. E.] 1835:122 [Proceedings of the Zoological Society of London 1834 (pt 2); ref. 18155] China. Syntypes: BMNH 1851.12.27.267 (1). •Valid as Acipenser sinensis Gray 1835 -- (Nakaya in Masuda et al. 1984:18 [ref. 6441], Zheng et al. 1989:19 [ref. 21202], Kuang in Pan et al. 1991:26 [ref. 23876], Ding 1994:30 [ref. 21531], Artyukhin 1995:7 [ref. 23782], Zhu 1995:6 [ref. 25213], Bemis et al. 1997:37 [ref. 22871], Cheng & Zhou 1997:63 [ref. 26385] dated 1834, Kim 1997:140 [ref. 24032], Birstein & Bemis 1997:158 [ref. 29760], Chen in Chen 1998:37 [ref. 23556], Yue & Chen 1998:13 [ref. 26415], Zhang 2001:34 [ref. 26586] dated 1834, Choi et al. 2003:136, 487 [ref. 26218], Hilton et al. 2011:136 [ref. 31407], Zhang et al. 2016:45 [ref. 34477] dated 1834, Zhang et al. 2019:117 [ref. 36699], Kim et al. 2020:49 [ref. 39118], Sonoyama et al. 2020:16 [ref. 37637], Guo 2021:67 [ref. 38617]). Current status: Valid as Acipenser sinensis Gray 1835. Acipenseridae. Distribution: Northwestern Pacific: Yangtze and Pearl River basins (China) to Sea of Japan (southern Korea, Japan). Habitat: freshwater, brackish, marine.

stellatus, Acipenser Pallas [P. S.] 1771:460 [Reise durch verschiedene Provinzen des russischen Reiches; ref. 18509] Ascending [northern] rivers from Caspain Sea (Russia). No types known. •Valid as Acipenser stellatus Pallas 1771 -- (Berg 1948:96 [ref. 12882], Svetovidov 1973:83 [ref. 7169], Svetovidov in Whitehead et al. 1984:223 [ref. 13675], Lelek 1987:54 [ref. 22962], Coad 1995:7 [ref. 23608], Artyukhin 1995:7 [ref. 23782], Sokolov & Tsepkin 1996:20 [ref. 24640], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:32 [ref. 22952], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:158 [ref. 29760], Sokolov 1998:22 [ref. 23571], Coad 1998:102 [ref. 23869], Pourkazemi et al. 2000:1 [ref. 25536], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:29 [ref. 26753], Hanel 2003:47 [ref. 27894], Bogutskaya & Naseka 2004:25 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369], Fricke et al. 2007:22 [ref. 29533], Kottelat & Freyhof 2007:56 [ref. 29996], Vasil'eva 2007:39 [ref. 30517], Ninua & Japoshvili 2008:164 [ref. 31251], Esmaeili et al. 2010:365 [ref. 33391], Lipej & Dulčić 2010:16 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Parin et al. 2014:44 [ref. 33547], Jouladeh-Roudbar et al. 2015:859 [ref. 34062], Barbieri et al. 2015:36 [ref. 35029], Çiçek et al. 2015:143 [ref. 35151], Esmaeili et al. 2017:25 [ref. 35254], Esmaeili et al. 2018:7 [ref. 36089], Ćaleta et al. 2019:144 [ref. 37026], Lorenzoni et al. 2019:251 [ref. 37108], Kovačić et al. 2020:9 [ref. 37519], Çiçek et al. 2020:243 [ref. 37644], Dyldin et al. 2020:79, 103 [ref. 37569], Jouladeh-Roudbar et al. 2020:18 [ref. 37983], Kuljanishvili et al. 2020:[4] [ref. 37535], Abliazov et al. 2021:8 [ref. 38576], Kovačić et al. 2021:18 [ref. 39014], Dyldin et al. 2022:[11] [ref. 39193], Niță et al. 2022:25 [ref. 40471], Çiçek et al. 2023:329 [ref. 40625], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:30 [ref. 40789]). Current status: Valid as Acipenser stellatus Pallas 1771. Acipenseridae. Distribution: Eastern Atlantic; Mediterranean Sea; Sea of Marmara; Black Sea; Caspian Sea. Habitat: freshwater, brackish, marine.

stenorrhynchus, Acipenser Nikolskii [A. M.] 1896:400 [Ezhegodnik, Zoologicheskago Muzeya Imperatorskoi Akademii Nauk v. 1; ref. 14614] Large rivers of Siberia flowing to the Arctic. Syntypes: ZIN 10641 (2), 10885 (1), 10888 (1). ZISP 10641 also type of variety baicalensis. •Synonym of Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies stenorrhynchus Nikolskii 1896 -- (Chereshnev 1996:599 [ref. 24659] as stenorhynchus, Chereshnev et al. 2001:32 [ref. 26736] as stenorhynchus, Reshetnikov 1997:725 [ref. 24702], Sokolov 1998:19 [ref. 23571], Bogutskaya & Naseka 2004:23 [ref. 28183], Ocock et al. 2006:26 [ref. 28933], Parin et al. 2014:40 [ref. 33547], Romanov et al. 2017:820 [ref. 35687], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). Current status: Synonym of Acipenser baerii Brandt 1869. Acipenseridae. Habitat: freshwater, brackish.

sterlet, Acipenser Brusina [S.] 1902:63 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Not available, name in synonymy. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

sterleta, Acipenser Güldenstädt [J. A. von] 1772:533 [Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae v. 16 (for 1771); ref. 5066] Not available, non-binominal. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae.

storeri, Acipenser (Huso) Duméril [A. H. A.] 1870:147 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Boston, Massachutsetts, U.S.A. Holotype (unique): MCZ 8931. •Synonym of Acipenser oxyrinchus Mitchill 1815 -- (Hilton et al. 2016:31 [ref. 35294]). Current status: Synonym of Acipenser oxyrinchus Mitchill 1815. Acipenseridae.

sturio, Acipenser Linnaeus [C.] 1758:237 [Systema Naturae, Ed. X v. 1; ref. 2787] Charente River at Saintes, France. Neotype: MNHN 1962-1295. Paralectotypes: BMNH 1853.11.12.210 (1); NRM 94 (1), 21711 (1). Type catalog: Fernholm & Wheeler 1983:209 [ref. 20707]. Lectotype selected by Kottelat & Freyhof 2009:77 [ref. 30320] as the specimen illustrated in Rondelet 1555:410; since that specimen is not in existence, Kottelat & Freyhof 2009:77 [ref. 30320] then designate MNHN 1962-1295 as the neotype to maintain sturio as the species of western and southern European species. They mistakenly referred to the neotype as the holotype on p. 77. •Synonym of Acipenser oxyrinchus Mitchell 1815, subspecies oxyrinchus Mitchell 1815 -- (Ross et al. 2001:76 [ref. 25978], Hilton et al. 2016:31 [ref. 35294]). •Valid as Acipenser sturio Linnaeus 1758 -- (Herrera 1896:16 [ref. 39336], Berg 1948:93 [ref. 12882], Svetovidov 1973:82 [ref. 7169], Svetovidov in Whitehead et al. 1984:224 [ref. 13675], Lelek 1987:42 [ref. 22962], Lepage & Rochard 1995:28 [ref. 22130], Artyukhin 1995:7 [ref. 23782], Mrakovcic et al. 1995:183 [ref. 23079], Chereshnev 1996:599 [ref. 24659], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:33 [ref. 22952], Reshetnikov et al. 1997:726 [ref. 24702], Birstein & Bemis 1997:160 [ref. 29760], Sokolov 1998:22 [ref. 23571], Gröger & Debus 2000:175 [ref. 24937], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:29 [ref. 26753], Hanel 2003:46 [ref. 27894], Bogutskaya & Naseka 2004:25 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369], Hanel & Lusk 2005:179 [ref. 28804], Fricke 2007:25 [ref. 30577], Fricke et al. 2007:22 [ref. 29533], Kottelat & Freyhof 2007:57 [ref. 29996], Vasil'eva 2007:39 [ref. 30517], Fricke 2008:13 [ref. 30182], Ninua & Japoshvili 2008:164 [ref. 31251], Kottelat & Freyhof 2009:77 [ref. 30320], Lipej & Dulčić 2010:16 [ref. 36649], Mecklenburg et al. 2011:117 [ref. 31212], Hilton et al. 2011:136 [ref. 31407], Khalaf 2013:4 [ref. 37897], Parin et al. 2014:45 [ref. 33547], Barbieri et al. 2015:36 [ref. 35029], Çiçek et al. 2015:143 [ref. 35151], Ćaleta et al. 2019:145 [ref. 37026], Carneiro et al. 2019:55 [ref. 37250], Iglésias et al. 2019:277 [ref. 37098], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:79 [ref. 37569], Iglésias et al. 2020:289 [ref. 37987], Kovačić et al. 2020:9 [ref. 37519], Çiçek et al. 2020:243 [ref. 37644], Kuljanishvili et al. 2020:[4] [ref. 37535], Bañón & Maño 2021:48 [ref. 38883], Kovačić et al. 2021:18 [ref. 39014], Dyldin et al. 2022:[11] [ref. 39193], Çiçek et al. 2023:329 [ref. 40625], Shumka et al. 2023:36 [ref. 40747], Artüz & Fricke 2024:537 [ref. 41509], Çiçek et al. 2024:30 [ref. 40789]). Current status: Valid as Acipenser sturio Linnaeus 1758. Acipenseridae. Distribution: Eastern Atlantic (currently only the Gironde Estuary, France, and adjacent waters); Mediterranean Sea; Sea of Marmara; Black Sea; Sea of Marmara. Re-introduced in Germany. Habitat: freshwater, brackish, marine.

sturioides, Acipenser Malm [A. W.] 1861:618 [Förhandlingar vid de Skandinaviske Naturforskarnes. v. 8 (for 1860); ref. 17594] Göta Elf near Göteborg, Sweden. Holotype (unique): NMG. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

sturionaster, Acipenser Brusina [S.] 1902:52 [Rad Jugoslavenske Akademije znanosti i umjetnosti. Zagrebu. No. 149; ref. 17292] Original not seen. Name in synonymy, not available. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae.

sturionellus, Acipenser Nardo [G. D.] 1860:71 [Prospetti sistematici degli animali delle provincie Venete et del mare Adriatico; ref. 18470] Name only, in synonymy; not available. •In the synonymy of Acipenser naccarii Bonaparte 1836 -- (Kottelat 1997:31 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser naccarii Bonaparte 1836. Acipenseridae.

suttkusi, Scaphirhynchus Williams [J. D.] & Clemmer [G. H.] 1991:19, Figs. 1-2 [Alabama Museum of Natural History Bulletin No. 10; ref. 19118] Overflow pool of Alabama River, just above mouth of Little River at Dixie Landing, Monroe County, Alabama, U.S.A. Holotype: TU 135000. Paratypes: (many) AU, UAIC, USNM 200617 (1), TU, UF 84888 [ex AU 25918] (1), UMMZ 218752-53 (1, 1). Plus additional material not designated as types. Type catalog: Bart & Taylor 1993:30 [ref. 20906]. •Valid as Scaphirhynchus suttkusi Williams & Clemmer 1991 -- (Boschung 1992:29 [ref. 23239], Mayden & Kuhajda 1996:241 [ref. 22395], Mettee et al. 1996:83 [ref. 25836], Bemis et al. 1997:37 [ref. 22871], Ross et al. 2001:79 [ref. 25978], Nelson et al. 2004:58 [ref. 27807], Boschung & Mayden 2004:109 [ref. 27995], Scharpf 2005:7 [ref. 28940], Page & Burr 2011:138 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Bagley et al. 2023:312 [ref. 41241], Page et al. 2023:49 [ref. 40505]). Current status: Valid as Scaphirhynchus suttkusi Williams & Clemmer 1991. Acipenseridae. Distribution: North America: Mississippi and Alabama (southeastern U.S.A.). Habitat: freshwater.

tanaica, Acipenser gueldenstadti var. Marty [V. J.] 1940:863 [Zoologicheskii Zhurnal v. 19 (no. 6); ref. 17607] Taganrog Bay, Sea of Azov, Russia. Syntypes: (many). Bogutskaya & Naseka 2004:23 [ref. 28183] date tanaica to Movchan 1927 as a natio (needs research). •Synonym of Acipenser gueldenstaedti Brandt & Ratzeburg 1833, subspecies cochicus Marty 1940 -- (Berg 1948:84 [ref. 12882], Svetovidov 1973:83 [ref. 7169]). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:23 [ref. 28183], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

thompsoni, Acipenser Ball [R.] in Thompson 1856:245, 246 [Fishes of Ireland; ref. 4390] Ireland. Not available, name in synonymy, as Thompsonii. •In the synonymy of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae.

transmontanus, Acipenser Richardson [J.] (ex Gairdner) 1836:278, Pl. 97 (fig. 2) [Fauna Boreali-Americana Part 3; ref. 3731] Vancouver, Washington, U.S.A; and Columbia River as high as Fort Colville. Syntypes: (2) whereabouts unknown. •Valid as Acipenser transmontanus Richardson 1836 -- (Lee et al. 1980:42 [ref. 22416], Eschmeyer & Herald 1983:61 [ref. 9277], McAllister 1990:42 [ref. 14674], Page & Burr 1991:27 [ref. 18983], Artyukhin 1995:7 [ref. 23782], Bemis et al. 1997:37 [ref. 22871], Birstein & Bemis 1997:160 [ref. 29760], Scott & Crossman 1998:96 [ref. 24570], Fuller et al. 1999:22 [ref. 25838], Dyer 2000:89 [ref. 26678], Musick et al. 2000:10 [ref. 24959], Brito M. 2002:10 [ref. 37221], Mecklenburg et al. 2002:115 [ref. 25968], Moyle 2002:106 [ref. 26449], Wydoski & Whitney 2003:41 [ref. 27816], Nelson et al. 2004:58 [ref. 27807], Love et al. 2005:15 [ref. 37547], Scharpf 2005:7 [ref. 28940], McPhail 2007:30 [ref. 31199], Minckley & Marsh 2009:69 [ref. 31114], Page & Burr 2011:137 [ref. 31215], Hilton et al. 2011:136 [ref. 31407], Page et al. 2013:58 [ref. 32708], Pietsch & Orr 2015:18 [ref. 34694], Kells et al. 2016:88 [ref. 35888], Burton & Lea 2019:34 [ref. 37205], Lorenzoni et al. 2019:251 [ref. 37108], Love et al. 2021:31 [ref. 39279], Page et al. 2023:49 [ref. 40505], Fricke et al. 2024:107 [ref. 41622]). Current status: Valid as Acipenser transmontanus Richardson 1836. Acipenseridae. Distribution: Eastern Pacific: Gulf of Alaska to Monterey, California (U.S.A.) and to Pacific coast of northern Baja California (Mexico); introduced in Lower Colorado River, Arizona, U.S.A., Chile, and Italy. Habitat: freshwater, brackish, marine.

truncatus, Dinoctus Rafinesque [C. S.] 1818:447 [American Monthly Magazine and Critical Review v. 3 (no. 6) (art. 6) (Oct.); ref. 3587] Ohio River, U.S.A. No types known. Apparently a mythical sturgeon. Acipenseridae.

tuecka, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:293 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Originally as tücka. Name in the synonymy of Acipenser schypa, not available. Also occurred in later literature as name only. •Questionably in the synonymy of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833. Acipenseridae. Habitat: freshwater, brackish, marine.

turritus, Acipenser Fitzinger [L. J. F. J.] & Heckel [J. J.] 1836:270 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Museum label name in the synonymy of Acipenser glaber, not available. Also appeared in Brusina 1902:61 [ref. 17292] as name in synonymy. •In the synonymy of Acipenser nudiventris Lovetsky 1828 -- (Kottelat 1997:31 [ref. 22952]). Nomen Nudum. Current status: Synonym of Acipenser nudiventris Lovetsky 1828. Acipenseridae.

valenciennii, Acipenser (Huso) Duméril [A. H. A.] 1870:180 [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Questionably Seine River; Sables d'Olonne, Vendée. Syntypes: MNHN 0000-3115 (1, dry) Seine R.; MNHN 0000-3573 (1, dry) Sables d'Olone. Type catalog: Bertin 1940:252-253 [ref. 293]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

vallisnerii, Acipenser Molin [R.] 1853:366, 371 [Rivista Periodica dei Lavori della I. R. Accademia di Scienze, Lettere ed Arti di Padova v. 1; ref. 17782] Po River, Italy. •Synonym of Huso huso (Linnaeus 1758) -- (Svetovidov 1973:84 [ref. 7169], Kottelat 1997:34 [ref. 22952], Jouladeh-Roudbar et al. 2020:19 [ref. 37983]). Current status: Synonym of Huso huso (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish, marine.

vulgaris, Acipenser Billberg [G. J.] 1833:52 [Linnéska Samfundets Handlingar v. 1 (for 1832); ref. 34146] Charente River at Saintes, France. Neotype: MNHN 1962-1295. Unnecessary replacement name for "Hurio Linn." [sic, should read Acipenser sturio Linnaeus 1758]; see Kullander 2016:113 [ref. 34147]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kullander 2016:113 [ref. 34147]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

vulgaris, Sturio Rafinesque [C. S.] 1810:41 [Indice d'ittiologia siciliana; ref. 3595] Sicily, Italy, Mediterranean Sea. Also in Brusina 1902:54 [ref. 17292]. Unneeded new name for (and objective synonym of) Acipenser sturio Linnaeus 1758. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952], Parenti 2019:104 [ref. 37117]). Replacement Name. Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.

yarrellii, Acipenser Duméril [A. H. A.] 1867:164 [Nouvelles Archives du Muséum d'Histoire Naturelle, Paris v. 3; ref. 14072] Seine River mouth, France. Syntypes: BMNH (2), MNHN 0000-3108 (1, dry). Type catalog: Bertin 1940:249 [ref. 293] with MNHN 3108 as holotype. Also appeared as Acipenser (Antaceus) yarrellii in Duméril 1870:215 [ref. 1147]. •Synonym of Acipenser sturio Linnaeus 1758 -- (Kottelat 1997:33 [ref. 22952]). Current status: Synonym of Acipenser sturio Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish, marine.