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 Petromyzontidae: [ 119 ] records

adriaticus, Petromyzon Nardo [G. D.] (ex Chiereghini) 1847:col. 109 [Sinonimia moderna delle specie registrate nell' opera intitolata: ...; ref. 17994] [Quarnero] Kvarner, Croatia, strait between Cres Island and Istra, Adriatic Sea (Mediterranean Sea). No types known. Also in Nardo 1860:86 [ref. 18470] and Ninni 1872:1 [ref. 17995]. Not treated by Renaud 2011:78 [ref. 31770]. •Questionably a synonym of Petromyzon marinus Linnaeus 1758 -- (Kottelat 1997:29 [ref. 22952]). Nomen Oblitum. Current status: Uncertain as Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

aepyptera, Ammocoetes Abbott [C. C.] 1860:327 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 12; ref. 15620] Ohio River, near Portland, Meigs County, Ohio, U.S.A. Holotype (unique): ANSP 354. Type catalog: Böhlke 1984:140 [ref. 13621]. •Valid as Okkelbergia aepyptera (Abbott 1860) -- (Lang et al. 2009:51 [ref. 31599]). •Valid as Lampetra aepyptera (Abbott 1860) -- (Lee et al. 1980:21 [ref. 22416], Robison & Buchanan 1988:73 [ref. 23393], Page & Burr 1991:23 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:95 [ref. 22809], Jenkins & Burkhead 1994:178 [ref. 21581], Warren et al. 1994:132 [ref. 25557], Stauffer et al. 1995:26 [ref. 23376], Mettee et al. 1996:71 [ref. 25836], Yamazaki & Goto 2000:8 [ref. 24514], Ross et al. 2001:69 [ref. 25978], Nelson et al. 2004:48 [ref. 27807], Boschung & Mayden 2004:93 [ref. 27995] with date as 1861, Scharpf 2005:5 [ref. 28940], Martin & White 2008:579 [ref. 29818], Page & Burr 2011:132 [ref. 31215], Renaud 2011:45 [ref. 31770], Page et al. 2013:48 [ref. 32708], Bagley et al. 2023:311 [ref. 41241], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Lampetra aepyptera (Abbott 1860). Petromyzontidae. Distribution: North America: eastern U.S.A. Habitat: freshwater, brackish.

alaskense, Lethenteron Vladykov [V. D.] & Kott [E.] 1978:7, Figs. 1-3, 5, 6a, 7b, 10d, 11c [Biological Papers of the University of Alaska No. 19; ref. 7038] West Creek, a tributary of Brooks Lake, Alaska, U.S.A. Holotype: NMC 1976-614. Paratypes: (67) NMC. Spelled originally (many times) as alaskense, incorrectly spelled alaskanse by Vladykov et al. in Lee et al. 1980:15 [ref. 22416]. •Synonym of Lethenteron japonicum (Martens 1868) -- (Holčík 1986:199 [ref. 24819]). •Valid as Lampetra alaskense (Vladykov & Kott 1978) -- (Lee et al. 1980:22 [ref. 22416] as alaskanse, McAllister 1990:26 [ref. 14674], Yamazaki & Goto 2000:8 [ref. 24514], Mecklenburg et al. 2002:63 [ref. 25968]). •Synonym of Lampetra appendix (DeKay 1842), but possibly a valid subspecies -- (Fuller et al. 1999:19 [ref. 25838]). •Questionable synonym of Lethenteron camtschaticum (Tilesius 1811) or Lethenteron kessleri (Anikin 1905) -- (Naseka & Renaud 2020:35, 51 [ref. 37921]). •Valid as Lethenteron alaskense Vladykov & Kott 1978 -- (Chereshnev 1996:598 [ref. 24659], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:130 [ref. 31215], Renaud 2011:66 [ref. 31770], Page et al. 2013:48 [ref. 32708], Mateus et al. 2013:46 [ref. 32714], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Lethenteron alaskense Vladykov & Kott 1978. Petromyzontidae. Distribution: Arctic Ocean drainage and western North Pacific (Alaska) and Northwest Territories, Canada. Habitat: freshwater.

alavariensis, Lampetra Mateus [C. S.], Alves [M. J.], Quintella [B. R.] & Almeida [P. R.] 2013:50, Figs. 5A, 6A. [Contributions to Zoology v. 82 (no. 1); ref. 32714] Ribeira de Mangas, Carvalheirs de Maceda, Ovar, 40°55'27.30"N, 8°37'19.20"W, Esmoriz drainage, Portugal. Holotype: MB05-002866. Paratypes: MB05-002867 (2). Plus non-type material. •Valid as Lampetra alavariensis Mateus, Alves, Quintella & Almeida 2013 -- (Pereira et al. 2021:[10] 1991 [ref. 40490]). Current status: Valid as Lampetra alavariensis Mateus, Alves, Quintella & Almeida 2013. Petromyzontidae. Distribution: Southwest Europe: Portugal. Habitat: freshwater.

americanus, Petromyzon Lesueur [C. A.] 1818:382 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Philadelphia, Pennsylvania, U.S.A. No types known. Redescribed and illustrated by Lesueur 1827:1, Pl. 1 [ref. 17524]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Smith 1986:42 [ref. 22186], Hardisty 1986:94 [ref. 24820], Renaud 2011:78 [ref. 31770]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

anomalum, Petromyzon De la Pylaie [A. J. M.] 1835:526 [Congrès Scientifique de France v. 2 (Sept. 1834) (art. 5); ref. 1086] Not available, no distinguishing features; from Nanson stream at Fougères, Ille-et-Vilaine, Bretagne, France. Not treated by Renaud 2011:63 [ref. 31770]. •Questionably in the synonymy of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Nomen Nudum. Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae.

appendix, Petromyzon DeKay [J. E.] 1842:381, Pl. 64 (fig. 211) [Zoology of New-York; ref. 1098] Providence, Rhode Island; Hudson River, U.S.A. Syntypes: apparently lost. •Valid as Lampetra appendix (DeKay 1842) -- (Lee et al. 1980:23 [ref. 22416], Smith 1986:38 [ref. 22186], Robison & Buchanan 1988:74 [ref. 23393], Page & Burr 1991:22 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:96 [ref. 22809], Jenkins & Burkhead 1994:175 [ref. 21581], Stauffer et al. 1995:28 [ref. 23376], Mettee et al. 1996:73 [ref. 25836], Lyons et al. 2000:20 [ref. 26594], Nelson et al. 2004:48 [ref. 27807], Bailey et al. 2004:59 [ref. 27882], Boschung & Mayden 2004:94 [ref. 27995], Scharpf 2005:5 [ref. 28940]). •Synonym of Lampetra lamottenii (Lesueur 1827) -- (Scott & Crossman 1998:64 [ref. 24570] as lamottei). •Valid as Lampetra appendix (DeKay 1842), subspecies appendix (DeKay 1842) -- (Fuller et al. 1999:19 [ref. 25838]). •Valid as Lethenteron appendix (DeKay 1842) -- (Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:129 [ref. 31215], Renaud 2011:68 [ref. 31770], Page et al. 2013:48 [ref. 32708], Mateus et al. 2013:46 [ref. 32714], Naseka & Renaud 2020:53 [ref. 37921], Bagley et al. 2023:311 [ref. 41241], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Lethenteron appendix (DeKay 1842). Petromyzontidae. Distribution: North America: southeastern Canada and eastern U.S.A. Habitat: freshwater.

argenteus, Petromyzon Kirtland [J. P.] 1838:170, 197 [Report on the zoology of Ohio v. 1 (pt. 2); ref. 18399] Big Miami River basin, Ohio, U.S.A. No types known. Objectively invalid; preoccupied by Petromyzon argenteus Bloch 1795, replaced by Petromyzon bdellium Jordan 1885. •Synonym of Ichthyomyzon unicuspis Hubbs & Trautman 1937 -- (Scott & Crossman 1998:54 [ref. 24570]). •Objective synonym of Ichthyomyzon bdellium (Jordan 1885) -- (Smith 1986:34 [ref. 22186], Renaud 2011:45 [ref. 31770]). 1°Homonym. Current status: Synonym of Ichthyomyzon bdellium (Jordan 1885). Petromyzontidae. Habitat: freshwater.

argenteus, Petromyzon Nardo [G. D.] (ex Chiereghini) 1847:col. 109 [Sinonimia moderna delle specie registrate nell' opera intitolata: ...; ref. 17994] Venice, Italy, Adriatic Sea (Mediterranean Sea). No types known. Objectively invalid; preoccupied by Petromyzon argenteus Bloch 1795. Also preoccupied by Petromyzon argenteus Kirtland 1838. Also in Nardo 1860:86 [ref. 18470] and Ninni 1872:3 [ref. 17995]. •Treated as possibly a synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952]). 1°Homonym. Current status: Uncertain as Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

argenteus, Petromyzon Bloch [M. E.] 1795:74, Pl. 415 (fig. 2) [Naturgeschichte der ausländischen Fische v. 9; ref. 464] Tranquebar [Tharangambadi, India] [in error, from Europe]. Syntypes: ZMB 4683 (2). Type catalog: Paepke & Schmidt 1988:159 [ref. 21041], Paepke 1999:112 [ref. 24282]. On p. 57 of Bloch's Ichthyologie, v. 12 [ref. 21381]. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952], Renaud 2011:58 [ref. 31770]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

astori, Petromyzon Girard [C. F.] 1858:380 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Astoria, Oregon, U.S.A. Holotype (unique): USNM 978. •Synonym of Entosphenus tridentatus (Richardson 1836) -- (Renaud 2011:34 [ref. 31770] with question). Current status: Synonym of Entosphenus tridentatus (Richardson 1836). Petromyzontidae. Habitat: freshwater, brackish, marine.

auremensis, Lampetra Mateus [C. S.], Alves [M. J.], Quintella [B. R.] & Almeida [P. R.] 2013:51, Figs. 5B, 6B [Contributions to Zoology v. 82 (no. 1); ref. 32714] Ribeira do Olival, Caxarias, Qurem, 39°42'15.60"N, 8°32'06.84"W, Tagus drainage, Portugal. Holotype: MB05-002869. Paratypes: MB05-002870 (3). •Valid as Lampetra auremensis Mateus, Alves, Quintella & Almeida 2013 -- (Tutman et al. 2017:541 [ref. 35349], Pereira et al. 2021:[10] 1991 [ref. 40490]). Current status: Valid as Lampetra auremensis Mateus, Alves, Quintella & Almeida 2013. Petromyzontidae. Distribution: Southwest Europe: Portugal. Habitat: freshwater.

aureus, Ammocoetes Bean [T. H.] 1881:159 [Proceedings of the United States National Museum v. 4 (no. 210); ref. 223] Anvik, Yukon River, 62°39'20''N, 160°12'33''W [63°N, 160°W], Yukon-Konyukuk Census Area, Alaska, U.S.A. Holotype (unique): USNM 21524. •Synonym of Lampetra japonica (Martens 1868) -- (Berg 1948:36 [ref. 12882]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819], Scott & Crossman 1998:61 [ref. 24570]). •Synonym of Lampetra camtschatica (Tilesius 1811) -- (Mecklenburg et al. 2002:62 [ref. 25968]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Renaud 2011:69 [ref. 31770], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:35 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

ayresii, Petromyzon Günther [A.] 1870:505 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] San Francisco Bay, Parr Terminal, Point Richmond, 37°54'35"N, 122°13'12"W, California, U.S.A. Neotype: CAS 25935. Replacement name for Petromyzon plumbeus Ayres 1855, preoccupied by Petromyzon plumbeus Shaw 1804. Neotype designated by Vladykov & Follett 1958:54 [ref. 12288] for plumbeus = ayresii. •Valid as Lampetra ayresii (Günther 1870) -- (Lee et al. 1980:24 [ref. 22416] as ayresi, Eschmeyer & Herald 1983:12 [ref. 9277], McAllister 1990:26 [ref. 14674] as ayresi, Page & Burr 1991:22 [ref. 18983] as ayresi, Scott & Crossman 1998:55 [ref. 24570] as ayresi, Yamazaki & Goto 2000:8 [ref. 24514] as ayresi, Mecklenburg et al. 2002:64 [ref. 25968], Beamish et al. 2002:576 [ref. 26237] as ayresi, Moyle 2002:101 [ref. 26449] as ayresi, Wydoski & Whitney 2003:36 [ref. 27816] as ayresi, Nelson et al. 2004:48 [ref. 27807], Love et al. 2005:1 [ref. 37547], Scharpf 2005:5 [ref. 28940], McPhail 2007:3 [ref. 31199], Lang et al. 2009:52 [ref. 31599] as "Lampetra" ayresii, Page & Burr 2011:131 [ref. 31215], Renaud 2011:57 [ref. 31770], Page et al. 2013:48 [ref. 32708], Pietsch & Orr 2015:12 [ref. 34694], Kells et al. 2016:60 [ref. 35888], Love et al. 2021:12 [ref. 39279], Carim et al. 2023:[14] [ref. 40103], Page et al. 2023:36 [ref. 40505]). •Valid as Occidentis ayresii (Günther 1870) -- (Carim et al. 2024:11 [ref. 41768]). Replacement Name. Current status: Valid as Occidentis ayresii (Günther 1870). Petromyzontidae. Distribution: Eastern Pacific: southern Alaska (U.S.A.) south to northern California (U.S.A.). Habitat: freshwater, brackish, marine.

bairdii, Petromyzon (Bathymyzon) Gill [T. N.] 1883:254 [Proceedings of the United States National Museum v. 6 (no. 380); ref. 1724] Gulf Stream off Cape Cod, Massachusetts, U.S.A., 40°02'N, 68°50'30"W, Albatross station 2048, depth 547 fathoms. Holotype (unique): USNM 33311. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Hardisty 1986:95 [ref. 24820], Renaud 2011:78 [ref. 31770]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

bdellium, Petromyzon Jordan [D. S.] 1885:792 [4] [United States Commission of Fish and Fisheries, Report of the Commissioner v. 13 (1885); ref. 2385] Great Miami River, Ohio, U.S.A. No types known. On p. 4 of separate. Replacement name for Petromyzon argenteus Kirtland 1838, preoccupied by Petromyzon argenteus Bloch 1795. •Valid as Ichthyomyzon bdellium (Jordan 1885) -- (Lee et al. 1980:15 [ref. 22416], Smith 1986:33 [ref. 22186], Page & Burr 1991:17 [ref. 18983], Boschung 1992:17 [ref. 23239], Etnier & Starnes 1993:90 [ref. 22809], Jenkins & Burkhead 1994:166 [ref. 21581], Stauffer et al. 1995:22 [ref. 23376], Mettee et al. 1996:63 [ref. 25836], Yamazaki & Goto 2000:8 [ref. 24514], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:4 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:124 [ref. 31215], Renaud 2011:45 [ref. 31770], Page et al. 2013:48 [ref. 32708], Bagley et al. 2023:311 [ref. 41241], Page et al. 2023:36 [ref. 40505]). Replacement Name. Current status: Valid as Ichthyomyzon bdellium (Jordan 1885). Petromyzontidae. Distribution: North America: Northeastern U.S.A. Habitat: freshwater.

bergi, Lampetra Vladykov [V. D.] 1925:251 [Zoologischer Anzeiger v. 64 (nos 11/12) (art. 2); ref. 15570] Upper Tisza River basin [Subcarpathian Ukraine], Ukraine. Syntypes: (many) ?BMNH 1929.4.16.1 (1); NMP P6V 8949 (1), P6V 8950 (1), P6V 80728 (1). Type catalog: Mlíkovský et al. 2011:156 [ref. 33498]. For comment on locality see Kottelat 1997:25 [ref. 22952]. •Synonym of Lampetra danfordi (Regan 1911) -- (Berg 1948:32 [ref. 12882]). •Synonym of Eudontomyzon danfordi Regan 1911 -- (Renaud & Holčík 1986:147 [ref. 24821], Kottelat 1997:25 [ref. 22952], Renaud 2011:38 [ref. 31770]). Current status: Synonym of Eudontomyzon danfordi Regan 1911. Petromyzontidae. Habitat: freshwater.

bicolor, Ammocoetes Lesueur [C. A.] 1818:386 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] Connecticut River, Northampton, Massachusetts, U.S.A. No types known. Redescribed and illustrated by Lesueur 1827:7, Pl. 4 [ref. 17524]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Smith 1986:42 [ref. 22186], Hardisty 1986:94 [ref. 24820], Renaud 2011:78 [ref. 31770] with question). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

bicolor, Petromyzon Shaw [G.] 1804:263 [General zoology or systematic natural history; ref. 4015] Unneeded new name for Petromyzon niger Lacepède 1802. •Synonym of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952], Renaud 2011:63 [ref. 31770]). Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

borealis, Ammocoetes Agassiz [L.] 1850:252 [Lake Superior; ref. 66] Michipicotin, on northeastern shore of Lake Superior, North America. Syntypes: MCZ 8876 (10). •Synonym of Ichthyomyzon fossor Reighard & Cummins 1916 or a senior synonym of I. unicuspis Hubbs & Troutman 1937 -- (Scott & Crossman 1998:51, 54 [ref. 24570]). Current status: Synonym of Ichthyomyzon fossor Reighard & Cummins 1916. Petromyzontidae. Habitat: freshwater.

borealis, Petromyzon Girard [C. F.] 1858:377 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Great Slave Lake, Northwest Territories, Canada. No types known. Based on Petromyzon fluvialis of Richardson 1836:294 (not of Linnaeus). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819]). •Synonym of Lampetra japonica (Martens 1868) -- (authors). •Synonym of Ichthyomyzon unicuspis Hubbs & Trautman 1937 -- (Scott & Crossman 1998:61 [ref. 24570]). •Synonym of Lampetra camtschatica (Tilesius 1811) -- (Mecklenburg et al. 2002:62 [ref. 25968]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Sheiko & Fedorov 2000:14 [ref. 25650], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:46 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

branchialis, Petromyzon Linnaeus [C.] 1758:230 [Systema Naturae, Ed. X v. 1; ref. 2787] Rhine River at Basel, Switzerland. Neotype: MHNG 816.18. Type catalog: Weber 1998:5 [ref. 32707]. Neotype designated by Kottelat 1997:27 [ref. 22952]. Misspelled bronchialis by Retzius 1800:303 [ref. 18622]. Not treated by Renaud 2011:58 [ref. 31770]. •Valid as Ammocoetes branchialis (Linnaeus 1758) -- (Herrera 1896:7 [ref. 39336] in synonymy of Lampetra planeri). •Objective synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952] after neotype designations). •Synonym of Lampetra fluviatilis (Linnaeus 1758) in part -- (Hardisty 1986:249 [ref. 24820], Reshetnikov 1998:16 [ref. 23570]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

caecus, Petromyzon Couch [J.] 1832:23, Figs. 9-10 [Magazine of Natural History and Journal of Zoology, Botany, Minerology, Geology, and Meterology v. 5 (no. 23, art. 4); ref. 5557] Cornwall, England. No types known. Not treated by Renaud 2011:63 [ref. 31770]. •Tentatively a synonym of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Current status: Uncertain as Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

camtschaticus, Petromyzon marinus Tilesius [W. G. von] 1811:240, Pl. 9 [Mémoires de l'Académie Impériale des Sciences de Sankt Pétersbourg (5e Série) v. 3; ref. 4408] Japan [original was Kamchatka, Russia]. Neotype: ZMB 6475. Neotype designated by Kottelat 1997:28 [ref. 22952]. •Questionably the same as Lethenteron japonicum (Martens 1868) -- (Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Valid as Lampetra camtschatica (Tilesius 1811) -- (Mecklenburg et al. 2002:62 [ref. 25968], Nelson et al. 2004:48 [ref. 27807], Love et al. 2005:1 [ref. 37547], Scharpf 2005:5 [ref. 28940]). •Valid as Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Sheiko & Fedorov 2000:14 [ref. 25650], Bogutskaya et al. 2001:42 [ref. 26178], Fedorov et al. 2003:11 [ref. 27579], Bogutskaya & Naseka 2004:20 [ref. 28183], Kottelat 2006:85 [ref. 28831], Kottelat & Freyhof 2007:43 [ref. 29996], Bogutskaya et al. 2008:313 [ref. 30085], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Mecklenburg et al. 2011:115 [ref. 31212], Page & Burr 2011:130 [ref. 31215], Renaud 2011:69 [ref. 31770], Page et al. 2013:48 [ref. 32708], Dolgov 2013:915 [ref. 33112], Parin et al. 2014:14 [ref. 33547], Renaud & Naseka 2015:75 [ref. 33833], Afonso et al. 2016:10, 181 [ref. 36199], Dyldin & Orlov 2016:543 [ref. 34656], Kells et al. 2016:60 [ref. 35888], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:22 [ref. 41055], Almeida & Biscoito 2019:26 [ref. 37302], Dyldin et al. 2020:78 [ref. 37569], Kim et al. 2020:35 [ref. 39118], Naseka & Renaud 2020:45 [ref. 37921], Dyldin et al. 2021:14 [ref. 38804], Dyldin & Orlov 2021:54 [ref. 38158], Love et al. 2021:12 [ref. 39279], Dyldin et al. 2022:[5] [ref. 39193], Page et al. 2023:36 [ref. 40505], Sakai et al. 2024:20 [ref. 41696]). Current status: Valid as Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Distribution: Arctic Ocean: almost circumpolar, including White Sea, Kara Sea; North Pacific: Japan north to Barents Sea, then south to Alaska (U.S.A.). Habitat: freshwater, brackish, marine.

caspicus, Agnathomyzon (Haploglossa) Gratzianov [V. I.] 1907:18 [Dnevnik' Zoologicheskogo Otdelenya Obshchestva Lyubiteley Estestvoznaniya, Antropologii i Etnografii, Moskva v. 3 (no. 7-8) (for Dec. 1906); ref. 1870] Kura River near Evlakh, Volga River near Kazan, and Moskva River (Royllier), Russia. No types known. Type catalog: Vasil'eva et al. 2001:11 [ref. 25714]. Also appeared as new in Gratzianow 1907:13 [ref. 1871]. •Synonym of Caspiomyzon wagneri (Kessler 1870) -- (Holčík 1986:120 [ref. 24819], Reshetnikov 1998:15 [ref. 23570], Renaud 2011:24 [ref. 31770], Jouladeh-Roudbar et al. 2020:6 [ref. 37983], Çiçek et al. 2024:24 [ref. 40789]). Current status: Synonym of Caspiomyzon wagneri (Kessler 1870). Petromyzontidae. Habitat: freshwater, brackish, marine.

castaneus, Ichthyomyzon Girard [C. F.] 1858:381 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Galena, Illinois [not Galena, Minnesota], U.S.A. Holotype (unique): USNM 979. Type catalog: Vasil'eva et al. 2001:57-58 [ref. 25714]. •Valid as Ichthyomyzon castaneus Girard 1858 -- (Lee et al. 1980:16 [ref. 22416], Robison & Buchanan 1988:71 [ref. 23393], Tomelleri & Eberle 1990:7 [ref. 24089], McAllister 1990:25 [ref. 14674], Page & Burr 1991:16 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:91 [ref. 22809], Knight & Hastings 1994:149 [ref. 25560] as Icthyomyzon, Cross & Collins 1995:19 [ref. 23394], Mettee et al. 1996:65 [ref. 25836], Scott & Crossman 1998:46 [ref. 24570], Yamazaki & Goto 2000:8 [ref. 24514], Renaud & de Ville 2000:333 [ref. 24887], Ross et al. 2001:64 [ref. 25978], Nelson et al. 2004:48 [ref. 27807], Bailey et al. 2004:56 [ref. 27882], Miller & Robison 2004:45 [ref. 27931]. Boschung & Mayden 2004:89 [ref. 27995], Scharpf 2005:4 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:123 [ref. 31215], Robison et al. 2011:458 [ref. 31590], Renaud 2011:47 [ref. 31770], Page et al. 2013:48 [ref. 32708], Bagley et al. 2023:311 [ref. 41241], McAllister et al. 2023:62 [ref. 41452], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon castaneus Girard 1858. Petromyzontidae. Distribution: Northern and eastern North America: Canada and U.S.A. Habitat: freshwater.

cibarius, Ammocoetes Girard [C. F.] 1858:383 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Fort Steilacoom, Puget Sound, Washington, U.S.A. Holotype (unique): USNM 981 [= USNM 6176]. •Questionably a synonym of Entosphenus tridentatus Richardson 1836 with author as Gairdner or synonym of Lampetra ayresii (Günther 1870) -- (Renaud 2011:35 and 57 [ref. 31770]). Current status: Synonym of Entosphenus tridentatus (Richardson 1836). Petromyzontidae. Habitat: freshwater, brackish, marine.

ciliatus, Petromyzon Ayres [W. O.] 1855:[2] col. 4 [The Pacific [newspaper] v. 4 (nos 7-22); ref. 13428] San Francisco Bay, California, U.S.A. Holotype (unique): apparently lost. Appeared first as above on 20 Apr., then in Ayres 1855:44 [ref. 159]. •Synonym of Entosphenus tridentatus (Gairdner 1836), but a valid subspecies -- (Reshetnikov 1998:16 [ref. 23570] as ciliaris). •Synonym of Lampetra tridentata (Richardson 1836) -- (authors). •Synonym of Entosphenus tridentatus (Gairdner 1836) -- (Scott & Crossman 1998:42 [ref. 24570], Renaud 2011:34 [ref. 31770], Dyldin & Orlov 2016:543 [ref. 34656]). Current status: Synonym of Entosphenus tridentatus (Richardson 1836). Petromyzontidae. Habitat: freshwater, brackish, marine.

communis, Ammocoetes Gistel [J.] 1848:104 [Naturgeschichte des Thierreichs; ref. 1822] Rivers and streams. No types known. Apparently an alternate name for Petromyson branchialis Linnaeus 1758. Not treated Renaud 2011:58 [ref. 31770] •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952] dated to 1850, p. 340). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

concolor, Ammocoetes Kirtland [J. P.] 1840:473, Pl. 27 (fig. 1) [Boston Journal of Natural History v. 3 (nos 3-4) (art. 10, 17); ref. 18404] Mahoning and Scioto rivers, Ohio, U.S.A. No types known. Apparently Petromyzon concolor of Wright 1892:439 [ref. 22767] is an identification and not a new species description. •Synonym of Ichthyomyzon unicuspis Hubbs & Trautman 1937 -- (Scott & Crossman 1998:54 [ref. 24570]). Current status: Synonym of Ichthyomyzon unicuspis Hubbs & Trautman 1937. Petromyzontidae. Habitat: freshwater.

danfordi, Eudontomyzon Regan [C. T.] 1911:200 [Annals and Magazine of Natural History (Series 8) v. 7 (no. 38); ref. 3640] Transylvania and Sebés River, Romania. Syntypes: (6) BMNH 1876.11.25.1 (1), 1951.5.22.1-5 [ex 1874.7.4.5] (5). Additional material: BMNH 1951.5.22.6-12 (7 or 6); ?BMNH (1) Sebés R. •Valid as Lampetra danfordi (Regan 1911) -- (Berg 1948:32 [ref. 12882]). •Valid as Eudontomyzon danfordi Regan 1911 -- (Renaud & Holčík 1986:146 [ref. 24821], Lelek 1987:29 [ref. 22962], Kottelat 1997:25 [ref. 22952], Yamazaki & Goto 2000:8 [ref. 24514], Vassilev & Pehlivanov 2005:161 [ref. 28369], Kottelat & Freyhof 2007:37 [ref. 29996], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Renaud 2011:38 [ref. 31770], Hanel & Andreska 2016:146 [ref. 34755], Pereira et al. 2021:[10] 1991 [ref. 40490], Nagy et al. 2023:356 [ref. 40348]). Current status: Valid as Eudontomyzon danfordi Regan 1911. Petromyzontidae. Distribution: Southeastern Europe: Danube River basin. Habitat: freshwater.

dentex, Petromyzon Anikin [V. P.] 1905:17 [Izvestiya Tomskogo Universiteta v. 27; ref. 15920] Mouth of Jenissei River at village Goltschicha, Siberia, Russia. Syntypes: (2). •Synonym of Lampetra japonica (Martens 1868), but questionably the same as L. kessleri (Anikin 1905) -- (Berg 1948:40 [ref. 12882]). •Synonym of Lethenteron kessleri (Anikin 1905) -- (Holčík 1986:221 [ref. 24819], Reshetnikov 1998:18 [ref. 23570]). •Synonym of Lethenteron reissneri (Dybowsky 1869) -- (Parin et al. 2014:15 [ref. 33547]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Naseka & Renaud 2020:47 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

dorsatus, Petromyzon marinus Wilder [B. G.] in Jordan & Gilbert 1883:869 [Bulletin of the United States National Museum No. 16; ref. 2476] Cayuga Lake, New York, U.S.A. Syntypes: USNM 31368 (3). •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Smith 1986:42 [ref. 22186], Hardisty 1986:95 [ref. 24820], Kottelat 1997:29 [ref. 22952], Reshetnikov 1998:19 [ref. 23570], Scott & Crossman 1998:70 [ref. 24570], Renaud 2011:78 [ref. 31770]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

epihexodon, Entosphenus Gill [T. N.] 1862:331 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 14; ref. 1668] Based on Petromyzon tridentatus of Girard (not Richardson [= Gairdner]); no description and no reference given for Girard; regarded as not sufficiently tied to a previous reference; not available. •In the synonymy of Entosphenus tridentatus (Richardson 1836). Nomen Nudum. Current status: Synonym of Entosphenus tridentatus (Richardson 1836). Petromyzontidae.

ernstii, Petromyzon Dybowski [B. N.] 1872:220 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 22; ref. 1170] Amur River mouth, Siberia, Russia. No types known. •Synonym of Lampetra japonica (Martens 1868) -- (Berg 1948:35 [ref. 12882]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:27 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

fluviatilis, Petromyzon Linnaeus [C.] 1758:230 [Systema Naturae, Ed. X v. 1; ref. 2787] Rhine River at Basel, Switzerland [originally: "in fluviis Europæ", European rivers]. Neotype: MHNG 816.18. Type catalog: Weber 1998:5 [ref. 32707]. Neotype designated by Kottelat 1997:27 [ref. 22952]. Misspelled flubiatile by Cabrera y Corro, Pérez & Hänseler 1817:12 [ref. 17319] in genus Petromison, see Graells 1887:186 [ref. 30438]. Species misspelled fluvialis in Richardson 1828:705 [ref. 18624]. •Valid as Lampetra fluviatilis (Linnaeus 1758) -- (Berg 1948:43 [ref. 12882], Vladykov 1973:3 [ref. 7159], Bianco & Maciacci 1982:156 [ref. 41559], Vladykov in Whitehead et al. 1984:65 [ref. 13675], Hardisty 1986:249 [ref. 24820], Lelek 1987:36 [ref. 22962], Bianco 1988:147 [ref. 22383], Kottelat 1997:27 [ref. 22952], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:16 [ref. 23570], Yamazaki & Goto 2000:8 [ref. 24514], Bilecenoğlu et al. 2002:172 [ref. 26753], Hanel 2003:45 [ref. 27894], Vasilyeva & Sotnikov 2004:102 [ref. 27630], Bogutskaya & Naseka 2004:20 [ref. 28183], Hanel & Lusk 2005:172 [ref. 28804], Fricke 2007:25 [ref. 30577], Fricke et al. 2007:10 [ref. 29533], Kottelat & Freyhof 2007:40 [ref. 29996], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:50 [ref. 31599], Mateus et al. 2011:162 [ref. 31634], Renaud 2011:58 [ref. 31770], Mateus et al. 2013:37 [ref. 32714], Parin et al. 2014:14 [ref. 33547], Hanel & Andreska 2016:8 [ref. 34755], Tutman et al. 2017:541 [ref. 35349], Martins & Carneiro 2018:20 [ref. 36550], Almeida & Biscoito 2019:25 [ref. 37302], Carneiro et al. 2019:15 [ref. 37250], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:78 [ref. 37569], Kovačić et al. 2021:7 [ref. 39014], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625]). Current status: Valid as Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Distribution: Baltic Sea; North Sea; western Mediterranean Sea; northeastern Atlantic: southern Norway south to Gibraltar, including Iceland; also adjacent freshwater habitats of Europe. Habitat: freshwater, brackish, marine.

folletti, Entosphenus Vladykov [V. D.] & Kott [E.] 1976:975, Figs. 1-3 [Canadian Journal of Zoology v. 54 (no. 6); ref. 7400] Near Clear Lake Reservoir, Klamath River basin, California, U.S.A. Holotype: NMC 75-1549. Paratypes: (30). •Valid as Lampetra folletti (Vladykov & Kott 1976) -- (Lee et al. 1980:25 [ref. 22416], Lorion et al. 2000:1019 [ref. 25020]). •In genus Lampetra, not treated as valid in Page & Burr 2011 [ref. 31215]. •Valid as Entosphenus folletti Vladykov & Kott 1976 -- (Yamazaki & Goto 2000:8 [ref. 24514], Renaud 2011:26 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:35 [ref. 40505]). Current status: Valid as Entosphenus folletti Vladykov & Kott 1976. Petromyzontidae. Distribution: North America: California (U.S.A.). Habitat: freshwater.

fossor, Ichthyomyzon Reighard [J.] & Cummins [H.] 1916:1, Pls. 1-2 [Occasional Papers of the Museum of Zoology University of Michigan v. 31; ref. 15254] Mill Creek, tributary to Huron River near Ann Arbor, Washtenaw County, Michigan, U.S.A. Holotype: UMMZ 107045 [ex old number UMMZ 48377]. Paratypes: UMMZ 60611-19 (6, 1, 8, 6, 1, 3, 1, 3, 2). •Valid as Ichthyomyzon fossor Reighard & Cummins 1916 -- (Lee et al. 1980:17 [ref. 22416], Smith 1986:34 [ref. 22186], McAllister 1990:25 [ref. 14674], Page & Burr 1991:16 [ref. 18983], Scott & Crossman 1998:49 [ref. 24570], Yamazaki & Goto 2000:8 [ref. 24514], Bailey et al. 2004:57 [ref. 27882], Scharpf 2005:4 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:122 [ref. 31215], Renaud 2011:49 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon fossor Reighard & Cummins 1916. Petromyzontidae. Distribution: North America: Canada and eastern-central U.S.A. Habitat: freshwater.

gagei, Ichthyomyzon Hubbs [C. L.] & Trautman [M. B.] 1937:80, Pls. 1 (fig. E), 2 (fig. F) [Miscellaneous Publications, Museum of Zoology, University of Michigan No. 35; ref. 11704] Stream 1/4 mile south of Dry Prong, Grant Parish, presumably a secondary tributary of Little River, Louisiana, U.S.A. Holotype: UMMZ 107042. Paratypes: UMMZ 64494 (3), 107043 (6); USNM 92300 (1). •Valid as Ichthyomyzon gagei Hubbs & Trautman 1937 -- (Lee et al. 1980:18 [ref. 22416], Robison & Buchanan 1988:72 [ref. 23393], Page & Burr 1991:17 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:92 [ref. 22809], Beamish et al. 1994:718 [ref. 22425], Warren et al. 1994:132 [ref. 25557], Knight & Hastings 1994:149 [ref. 25560], Mettee et al. 1996:67 [ref. 25836], Yamazaki & Goto 2000:8 [ref. 24514], Ross et al. 2001:66 [ref. 25978], Nelson et al. 2004:48 [ref. 27807], Miller & Robison 2004:46 [ref. 27931], Boschung & Mayden 2004:90 [ref. 27995], Scharpf 2005:4 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:123 [ref. 31215], Renaud 2011:50 [ref. 31770], Page et al. 2013:48 [ref. 32708], Robins et al. 2018:35 [ref. 35886], Bagley et al. 2023:311 [ref. 41241], McAllister et al. 2023:62 [ref. 41452], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon gagei Hubbs & Trautman 1937. Petromyzontidae. Distribution: North America: eastern-central and northern-central U.S.A. Habitat: freshwater.

geminis, Tetrapleurodon Álvarez [J.] 1966:121, Fig. 5 [Anales de la Escuela Nacional de Ciencias Biológicas, México v. 13 (nos 1-4) (for 1964); ref. 20548] Río Celio at Jacona, Michoacán, Mexico. Holotype: whereabouts unknown. Paratypes: (12) UMMZ 186438 (1). •Valid as Lampetra geminis (Álvarez 1966) (often dated 1964) -- (Espinosa Pérez et al. 1993:7 [ref. 22290], Cochran et al. 1996:174 [ref. 22597], Lyons et al. 1996:366 [ref. 25521], Castro-Aguirre et al. 1999:37 [ref. 24550], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:5 [ref. 28940], Miller 2006:77 [ref. 28615]). •Valid as Tetrapleurodon geminis Álvarez 1966 (often dated 1964) -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:48 [ref. 31599], Renaud 2011:81 [ref. 31770], Page et al. 2013:48 [ref. 32708], Pereira et al. 2021:[10] 1991 [ref. 40490], Page et al. 2023:36 [ref. 40505], Fricke et al. 2024:58 [ref. 41622]). Current status: Valid as Tetrapleurodon geminis Álvarez 1966. Petromyzontidae. Distribution: North America: Río Duero and Río Grande de Morelia (Michoacán, Mexico) endemic. Habitat: freshwater.

gracilis, Lampetra (Eudontomyzon) Kux [Z.] 1965:294 (German p. 299), Figs. 3, 7, 11 [Časopis Moravského Musea v Brně = Acta Musei Moraviae Védy Prírodní = Scientiae naturalis v. 50; ref. 9222] Toplá River, Lukov, River Tisza basin, eastern Slovakia. Holotype: MMB 1247/7. Paratypes: (67) MMB 1099/4 (1). •Synonym of Eudontomyzon danfordi Regan 1911 -- (Renaud & Holčík 1986:147 [ref. 24821], Kottelat 1997:25 [ref. 22952], Renaud 2011:38 [ref. 31770], Hanel & Andreska 2016:17 [ref. 34755]). Current status: Synonym of Eudontomyzon danfordi Regan 1911. Petromyzontidae. Habitat: freshwater.

graecus, Eudontomyzon Renaud [C. B.] & Economidis [P. S.] 2010:38, Figs. 1-2 [Zootaxa No. 2477; ref. 30894] Filippiás Brook, near Filippiás, 39°12'N, 20°53'E, Loúros River drainage, Ionian Sea basin, Epirus Periphery, Greece. Holotype: CMNFI 1986-0741. Paratypes: CMNFI 1977-1741 (9), 1986-0720 (12), 1986-0738 (5), 1986-0741A (19); ZMH 4210 (2). Not treated by Renaud 2011:38 [ref. 31770]. •Valid as Eudontomyzon graecus Renaud & Economidis 2010 -- (Mateus et al. 2013:46 [ref. 32714]). •Valid as Caspiomyzon graecus (Renaud & Economidis 2010) -- (Barbieri et al. 2015:33 [ref. 35029] with authors not in parentheses, Pereira et al. 2021:[10] 1991 [ref. 40490], Shumka et al. 2023:37 [ref. 40747]). Current status: Valid as Caspiomyzon graecus (Renaud & Economidis 2010). Petromyzontidae. Distribution: Southeast Europe: Louros River drainage, Ionian Sea basin (Albania and Greece). Habitat: freshwater.

greeleyi, Ichthyomyzon Hubbs [C. L.] & Trautman [M. B.] 1937:93, Pls. 1 (fig. F), 2 (fig.H) [Miscellaneous Publications, Museum of Zoology, University of Michigan No. 35; ref. 11704] French Creek, a tributary of Allegheny River, 1.6 kilometers east of Wattsburg, Erie County, Pennsylvania, U.S.A. Holotype: UMMZ 92317. Paratypes: CM 8590 (1); UMMZ 91545-46 (1, 4), 94981 (14), 18105-12 (22, 2, 14, 2, 18, 9, 18, 4), 102389-90 (3, 1), 106836 (1), 108103 (9), 108105-112 (98), 108104 (3), 109084-85 (1, 3). •Valid as Ichthyomyzon greeleyi Hubbs & Trautman 1937 -- (Lee et al. 1980:19 [ref. 22416], Smith 1986:36 [ref. 22186], Page & Burr 1991:20 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:93 [ref. 22809], Jenkins & Burkhead 1994:170 [ref. 21581], Stauffer et al. 1995:23 [ref. 23376], Mettee et al. 1996:69 [ref. 25836], Yamazaki & Goto 2000:8 [ref. 24514], Boschung & Mayden 2004:91 [ref. 27995], Scharpf 2005:5 [ref. 28940], Lang et al. 2009:45 [ref. 31599], Page & Burr 2011:124 [ref. 31215], Renaud 2011:52 [ref. 31770], Page et al. 2013:48 [ref. 32708], Bagley et al. 2023:311 [ref. 41241], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon greeleyi Hubbs & Trautman 1937. Petromyzontidae. Distribution: North America: eastern-central U.S.A. Habitat: freshwater.

hattai, Lethenteron Iwata [A.], Sakai [H.] & Goto [A.] in Sakai, Iwata, Watanabe & Goto 2024:25, Figs. 6c-d, 7b, 8b, 9b, h, n, 10b, c, i, j, p [Ichthyological Research Online First; ref. 41696] Inami River, Koya River system, Shimonoseki, Yamaguchi Prefecture, Japan, 34°12'21.6"N, 131°04'56"E. Holotype: NSMT-P 147515. Paratypes: BIHM, HUMZ, KMNH, LBM, NSMT, THM. •Valid as Lethenteron hattai Iwata, Sakai & Goto 2024. Current status: Valid as Lethenteron hattai Iwata, Sakai & Goto 2024. Petromyzontidae. Distribution: East Asia: Akita to Nagasaki Prefectures, Honshu, Shikoku, and Kyushu Islands, Japan, and southern Korean Peninsula. Habitat: freshwater, brackish, marine.

hellenicus, Eudontomyzon Vladykov [V. D.], Renaud [C. B.], Kott [E.] & Economidis [P. S.] 1982:2898, Figs. 1, 2, 3 (a, c), 7, 9a, 10a [Canadian Journal of Zoology v. 60 (no. 11); ref. 8404] Kefalárion brook, tributary to Struma [Strymon] River, near Kefalárion, Greece. Holotype: NMC 1977-1773. Paratypes: (313). •Valid as Eudontomyzon hellenicus Vladykov, Renaud, Kott & Economidis 1892 -- (Renaud 1986:186 [ref. 24823], Lelek 1987:33 [ref. 22962], Economidis 1995:201 [ref. 23025], Kottelat 1997:25 [ref. 22952], Yamazaki & Goto 2000:8 [ref. 24514], Kottelat & Freyhof 2007:37 [ref. 29996], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:52 [ref. 31599] as "Eudontomyzon" hellenicus, Renaud & Economidis 2010:40 [ref. 30894], Renaud 2011:40 [ref. 31770], Mateus et al. 2013:46 [ref. 32714]). •Valid as Caspiomyzon hellenicus (Vladykov, Renaud, Kott & Economidis 1982) -- (Barbieri et al. 2015:33 [ref. 35029] with authors not in parentheses, Pereira et al. 2021:[10] 1991 [ref. 40490]). Current status: Valid as Caspiomyzon hellenicus (Vladykov, Renaud, Kott & Economidis 1982). Petromyzontidae. Distribution: Southeast Europe: Strymon River basin (Greece). Habitat: freshwater.

hirudo, Ichthyomyzon Girard [C. F.] 1858:382 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Arkansas River, Fort Smith, Arkansas, U.S.A. Holotype (unique): USNM 980. •Synonym of Ichthyomyzon castaneus Girard 1858 -- (Renaud 2011:47 [ref. 31770]). Current status: Synonym of Ichthyomyzon castaneus Girard 1858. Petromyzontidae. Habitat: freshwater.

hubbsi, Entosphenus Vladykov [V. D.] & Kott [E.] 1976:60, Figs. 1-3 [Bulletin of the Southern California Academy of Sciences v. 75 (pt 2); ref. 12298] Canal east of Delano, Kern County, California, U.S.A. Holotype: CAS 35987. Paratypes: CAS 35988 (10, now 8). •Valid as Entosphenus hubbsi Vladykov & Kott 1976 -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:51 [ref. 31599] as "Entosphenus" hubbsi, Page & Burr 2011:129 [ref. 31215], Renaud 2011:28 [ref. 31770]). •Valid as Lampetra hubbsi (Vladykov & Kott 1976) -- (Lee et al. 1980:26 [ref. 22416], Vladykov & Kott 1984:123 [ref. 13935], Page & Burr 1991:21 [ref. 18983], Moyle 2002:103 [ref. 26449], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:5 [ref. 28940], Reid et al. 2011:42 [ref. 31592], Page et al. 2013:48 [ref. 32708], Carim et al. 2023:[14] [ref. 40103], Page et al. 2023:36 [ref. 40505]). •Valid as Occidentis hubbsi (Vladykov & Kott 1976) -- (Carim et al. 2024:11 [ref. 41768]). Current status: Valid as Occidentis hubbsi (Vladykov & Kott 1976). Petromyzontidae. Distribution: North America: California (U.S.A.). Habitat: freshwater.

hubbsi, Ichthyomyzon Raney [E. C.] 1952:93, Pl. 1 [Copeia 1952 (no. 2); ref. 12802] Nottely River, tributary of Hiwassee River, Tennessee River System, 8 miles south-southeast of Blairsville, Union County, Georgia, U.S.A. Holotype: CUMV 20324. Paratypes: CUMV 10985 (5), 19532 (2); UMMZ 129324 (4), 136312-14 (3, 1, 13), 141202 (1 of 2); plus non-types. •Synonym of Ichthyomyzon greeleyi Hubbs & Trautman 1937 -- (Etnier & Starnes 1993:93 [ref. 22809]). Current status: Synonym of Ichthyomyzon greeleyi Hubbs & Trautman 1937. Petromyzontidae. Habitat: freshwater.

japonicus, Petromyzon Martens [E. von] 1868:3, Pl. 1 (fig. 2) [Archiv für Naturgeschichte v. 34 (pt. 1); ref. 14097] Tokyo or Yokohama, Japan. Lectotype: ZMB 6475. Paralectotypes: ZMB 6476 (1). Type catalog: Paepke & Schmidt 1988:159 [ref. 21041]. Lectotype selected by Kottelat 1997:28 [ref. 22952]. •Valid as Entosphenus japonicus (Martens 1868) -- (Okada 1961:269 [ref. 6363]). •Valid as Lampetra japonica (Martens 1868) -- (Berg 1948:35 [ref. 12882], Lee et al. 1980:27 [ref. 22416], Sato in Masuda et al. 1984:2 [ref. 6441], Kawanabe & Mizuno 1989:34 [ref. 25598], McAllister 1990:26 [ref. 14674], Page & Burr 1991:21 [ref. 18983], Zhu 1995:3 [ref. 25213], Kim 1997:134 [ref. 24032], Yue & Chen 1998:3 [ref. 26415], Kim & Park 2002:30 [ref. 25913], Choi et al. 2003:38, 466 [ref. 26218] as japonicus, Chen et al. 2024:7 [ref. 41712]). •Synonym of Ichthyomyzon unicuspis Hubbs & Trautman 1937 -- (Scott & Crossman 1998:58 [ref. 24570]). •Valid as Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:4 [ref. 7159], Vladykov in Whitehead et al. 1984:66 [ref. 13675], Lelek 1987:34 [ref. 22962], Yamazaki & Goto 1996:283 [ref. 22431], Chereshnev 1996:598 [ref. 24659], Nikiforov et al. 1997:330 [ref. 24694], Reshetnikov et al. 1997:725 [ref. 24702], Yamazaki et al. 1998:404 [ref. 24510], Reshetnikov 1998:17 [ref. 23570], Sokolovskaya et al. 1998:7 [ref. 24670], Yamazaki & Goto 2000:8 [ref. 24514], Nakabo 2000:111 [ref. 25086], Matsuura et al. 2000:13 [ref. 26000], Nakabo 2002:111 [ref. 26001], Sotnikov & Solov'yov 2002:838 [ref. 26576], Hagiwara 2003:34 [ref. 27188], Zhang et al. 2016:44 [ref. 34447]). •Synonym of Lampetra camtschatica (Tilesius 1811) -- (Mecklenburg et al. 2002:62 [ref. 25968]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Sheiko & Fedorov 2000:14 [ref. 25650], Pietsch et al. 2001:138 [ref. 25688], Kottelat 2006:85 [ref. 28831], Renaud 2011:69 [ref. 31770], Parin et al. 2014:14 [ref. 33547], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:24 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Distribution: Arctic drainages and North Pacific. Habitat: freshwater, brackish, marine.

jurae, Petromyzon MacCulloch [J.] 1819:187 (of vol. 2), Pl. 29 (fig. 1) (in vol. 3) [A description of the western islands of Scotland; ref. 20245] Jura Island, Scotland, U.K. Holotype (unique): whereabouts unknown. A note about this species, including a figure, appeared in Yarrell 1859:30 (2nd suppl. to 2nd vol. of History of British Fishes; 3rd edition of ref. 4812). Not treated by Renaud 2011:58 [ref. 31770]. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

kameraticus, Petromyzon Dybowski [B. N.] 1869:948 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 19; ref. 1169] Original not seen. Not available, no distinguishing features. •In the synonymy of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Naseka & Renaud 2020:46 [ref. 37921]). Nomen Nudum. Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae.

kessleri, Petromyzon Anikin [V. P.] 1905:10 [Izvestiya Tomskogo Universiteta v. 27; ref. 15920] Tom River and mouth of Kirgizka River near Tomsk, Ob River system, western Siberia, Russia. Syntypes: (16) Tomsk State University 3698 (1), 3702 (1). •Synonym of Lampetra japonica (Martens 1868), but a valid subspecies -- (Berg 1948:40 [ref. 12882], Scott & Crossman 1998:59 [ref. 24570]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159]). •Valid as Lampetra kessleri (Anikin 1905) -- (Sato in Masuda et al. 1984:2 [ref. 6441], Kawanabe & Mizuno 1989:36 [ref. 25598]). •See Kottelat 2006:14 [ref. 28831]. •Synonym of Lethenteron reissneri (Dybowski 1869) -- (Kottelat 2006:13 [ref. 28831] with question, Parin et al. 2014:15 [ref. 33547]). •Valid as Lethenteron kessleri (Anikin 1905) -- (Holčík 1986:220 [ref. 24819], Yamazaki & Goto 1996:283 [ref. 22431], Chereshnev 1996:598 [ref. 24659], Yamazaki & Iwata 1997:51 [ref. 24065], Nikiforov et al. 1997:330 [ref. 24694], Reshetnikov et al. 1997:725 [ref. 24702], Reshetnikov 1998:18 [ref. 23570], Yamazaki & Goto 2000:8 [ref. 24514], Nakabo 2000:111 [ref. 25086], Matsuura et al. 2000:14 [ref. 26000], Chereshnev et al. 2001:30 [ref. 26736], Pietsch et al. 2001:138 [ref. 25688], Bogutskaya et al. 2001:42 [ref. 26178], Nakabo 2002:111 [ref. 26001], Sotnikov & Solov'ef 2002:838 [ref. 26576], Yamazaki et al. 2003:592 [ref. 27883] with author as Anckin, Bogutskaya & Naseka 2004:20 [ref. 28183], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Renaud 2011:72 [ref. 31770], Mateus et al. 2013:46 [ref. 32714], Romanov et al. 2017:820 [ref. 35687], Dolgov et al. 2018:24 [ref. 41055], Naseka & Renaud 2020:51 [ref. 37921], Dyldin et al. 2022:[5] [ref. 39193], Sakai et al. 2024:20 [ref. 41696]). Current status: Valid as Lethenteron kessleri (Anikin 1905). Petromyzontidae. Distribution: Eurasia: Siberia (Russia) and eastern Europe. Habitat: freshwater, brackish, marine.

labiata, Ammocoetes Zograf [N.] & Kavraisky [F. F.] 1889:2 [Izvestiya Obshchestva Lyubitelei Estestvoznaniya, Antropologii i Etnografii v. 61 (no. 1); ref. 20283] Amur River, Russia. Syntypes: ZMMU P-554 (orig. 5, now 4). Current status: Uncertain. Petromyzontidae.

ladogensis, Lampetra fluviatilis morpha Ivanova-Berg [M. M.] 1966:565 [Voprosy Ikhtiologii v. 6 (no. 3, 40); ref. 22957] Original not seen. Infrasubspecific, not available; from Lake Ladoga, Russia. Not treatred by Renaud 2011:58 [ref. 31770]. •In the synonymy of Lampetra fluviatilis (Linnaeus 1758) -- (Hardisty 1986:250 [ref. 24820], Kottelat 1997:27 [ref. 22952], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:16 [ref. 23570]). Infrasubspecific. Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae.

lamottenii, Petromyzon Lesueur [C. A.] 1827:5, Pl. 3 [American ichthyology, or natural history of the fishes of North America, with coloured figures executed from nature.; ref. 17524] In a cave formed by the rapid current and secluded from the rays of the sun...to the Lamotte mine in Missouri, U.S.A. No types known. •Status uncertain -- (Lee et al. 1980:23 [ref. 22416], Smith 1986:40 [ref. 22186]). •Valid as Lampetra lamottenii (Lesueur 1827) -- (McAllister 1990:26 [ref. 14674]). •Valid as Lampetra lamottei [sic] (Lesueur 1827) -- (Scott & Crossman 1998:62 [ref. 24570]). •Not treated as valid in Page & Burr 2011 [ref. 31215]. •Questionably the same as Lethenteron appendix (DeKay 1842) -- (Renaud 2011:68 [ref. 31770]). Current status: Synonym of Lethenteron appendix (DeKay 1842). Petromyzontidae. Distribution: Canada, Alaska and northern mainland U.S.A. [if treated as valid]. Habitat: freshwater.

lampetra, Petromyzon Forsskål [P. S.] in Niebuhr (ex Anonymous) 1775:xviii [Descriptiones animalium (Forsskål); ref. 1351] "Melita" (La Valletta, Malta, Mediterranean Sea). Not available, name only. •Unidentifiable in Petromyzontidae, based on either Petromyzon marinus Linnaeus, 1758 or Lampetra fluviatilis (Linnaeus, 1758) -- (Fricke 2008:8 [ref. 30182]). Nomen Nudum. Current status: Uncertain. Petromyzontidae.

lampetra, Petromyzon Pallas [P. S.] 1814:66 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Basel, Switzerland. No types known. Lectotype selected by Kottelat 1997:29 [ref. 22952] as the specimen illustrated by Gesner 1604:690 [specimen not in existence]. Not treated by Renaud 2011:78 [ref. 31770]. •Questionably a synonym of Lethenteron japonicum (Martens 1868) -- (Holčík 1986:196 [ref. 24819]). •Synonym of Petromyzon marinus Linnaeus 1758 -- (Kottelat 1997:29 [ref. 22952]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

lamproyon, Ammocoetes Römer-Büchner [B. J.] 1827:71 [Verzeichniss der Steine und Thiere in dem Gebiete von Frankfurt; ref. 19809] Erlenbach, Urselbach, near Frankfurt, Germany. Syntypes: whereabouts unknown. Not treated by Renaud 2011:63 [ref. 31770]. •Synonym of Lampetra planeri (Bloch 1784). Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

lanceolata, Lampetra Kux [Z.] & Steiner [H. M.] 1972:377, Figs. 1-3, 6, 10 [Časopis Moravského Musea, Acta Musei Moraviae, Vědy Přírodní / Scientiae Naturales No. 56/57 (for 1971-1971); ref. 20918] Upstream of Iyidere River, Trabzon, Turkey. Holotype: MMB [Mährischen Mus., Brünn] 2077/2. •Valid as Eudontomyzon lanceolata (Kux & Steiner 1972) -- (Bogutskaya & Naseka 2004:19 [ref. 28183], Fricke et al. 2007:10 [ref. 29533]). •Valid as Lampetra lanceolata Kux & Steiner 1972 -- (Yamazaki & Goto 2000:8 [ref. 24514], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:50 [ref. 31599], Renaud 2011:60 [ref. 31770], Çiçek et al. 2015:142 [ref. 35151], Tutman et al. 2017:541 [ref. 35349], Çiçek et al. 2018:2 [ref. 36267], Çiçek et al. 2020:242 [ref. 37644], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625], Çiçek et al. 2024:25 [ref. 40789]). Current status: Valid as Lampetra lanceolata Kux & Steiner 1972. Petromyzontidae. Distribution: Eurasia: southern Black Sea basin (Turkey). Habitat: freshwater.

larvalis, Petromyson fluviatilis forma Smitt [F. A.] 1895:1189 [A history of Scandinavian fishes; ref. 4146] Appeared in Smitt's synonymy as, "C: forma larvalis." Not available, infrasubspecific. Not treated by Renaud 2011:63 [ref. 31770]. •In the synonymy of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Infrasubspecific. Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae.

lethophaga, Lampetra (Entosphenus) Hubbs [C. L.] 1971:126, Figs. 1, 2a-b, 6 [Transactions of the San Diego Society of Natural History v. 16 (no. 6); ref. 7683] Headwaters of Fall River, tributary to Pit River, Shasta County, California, U.S.A. Holotype: UMMZ 130648. Paratypes: UMMZ 130649 (1). Additional material: CAS 25987 (1); CUMV; OS 2856-K0010 (1); SIO 65-144 (1); CAS-SU 28783 (1), 35555 (1); UMMZ 55316 (2), 130573 (2), 130576 (1), 130606 (34), 130648 (1), 136678 (2), 136683 (2); USNM. •Valid as Lampetra lethophaga Hubbs 1971 -- (Lee et al. 1980:28 [ref. 22416], Page & Burr 1991:21 [ref. 18983], Lorion et al. 2000:1019 [ref. 25020], Moyle 2002:99 [ref. 26449], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:5 [ref. 28940]). •Valid as Entosphenus lethophagus (Hubbs 1971) -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:128 [ref. 31215], Renaud 2011:30 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:35 [ref. 40505]). Current status: Valid as Entosphenus lethophagus (Hubbs 1971). Petromyzontidae. Distribution: North America: Oregon and California (U.S.A.). Habitat: freshwater.

leucopterus, Petromyzon Rafinesque [C. S.] 1818:205 [American Monthly Magazine and Critical Review v. 2 (no. 3); ref. 13337] Delaware River and Philadelphia, Pennsylvania, U.S.A. No types known. Current status: Uncertain. Petromyzontidae.

lividus, Petromyzon Girard [C. F.] 1858:379 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Wahlahmath River, Oregon, U.S.A. Holotype (unique): USNM 976. •Synonym of Entosphenus tridentatus (Richardson 1836) -- (Renaud 2011:34 [ref. 31770] with question). Current status: Synonym of Entosphenus tridentatus (Richardson 1836). Petromyzontidae. Habitat: freshwater, brackish, marine.

lumbricalis, Petromyzon Pallas [P. S.] 1814:69 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Japan. Neotype: ZMB 6475. Neotype designated by Kottelat 1997:28 [ref. 22952]. •Synonym of Letherenteron japonicus (Martens 1868) (in part) -- (Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Possible senior synonym of Lethenteron kessleri (Anikin 1905) -- (Holčík 1986:220 [ref. 24819], Reshetnikov 1998:18 [ref. 23570]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Sheiko & Fedorov 2000:14 [ref. 25650], Renaud 2011:69 [ref. 31770], Parin et al. 2014:14 [ref. 33547], Dyldin & Orlov 2016:543 [ref. 34656]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

lusitanica, Lampetra Mateus [C. S.], Alves [M. J.], Quintella [B. R.] & Almeida [P. R.] 2013:53, Figs. 5C, 6C [Contributions to Zoology v. 82 (no. 1); ref. 32714] Ribeira da Marateca, Landeira, Verdas Novas, 38°35'39.46"N, 8°38'43.86"W, Sado drainage, Portugal. Holotype: MB05-002871. Paratypes: MB05-002872 (22). •Valid as Lampetra lusitanica Mateus, Alves, Quintella & Almeida 2013 -- (Tutman et al. 2017:541 [ref. 35349], Pereira et al. 2021:[10] 1991 [ref. 40490]). Current status: Valid as Lampetra lusitanica Mateus, Alves, Quintella & Almeida 2013. Petromyzontidae. Distribution: Southwest Europe: Portugal. Habitat: freshwater.

macrops, Petromyzon Blainville [H. de] 1825:7, Pl. 2 (fig. 2) [Faune Française; ou histoire naturelle Livr. 13 & 14; ref. 4991] Large rivers of France. No types known. Not treated by Renaud 2011:58 [ref. 31770]. •Possible synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952]). Current status: Uncertain as Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

macrostoma, Lampetra Beamish [R. J.] 1982:737, Figs. 1 (A, B, D, F.) [Canadian Journal of Fisheries and Aquatic Sciences v. 39 (no. 5); ref. 8510] Lake Cowichan, 48°52'36"N, 124°17'00"W, Vancouver Island, British Columbia, Canada (attached to a coho salmon). Holotype: NMC 81-1219. Paratypes: NMC 81-1220 (94). Non-types (immature): NMC 81-1221 (16), 81-1222 (1). Specific name is an indeclinable noun. •Valid as Lampetra macrostoma Beamish 1982 -- (McAllister 1990:26 [ref. 14674], Page & Burr 1991:20 [ref. 18983], Scott & Crossman 1998:viii [ref. 24570], Beamish 2001:127 [ref. 25423], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:5 [ref. 28940], McPhail 2007:8 [ref. 31199]). •Valid as Entosphenus macrostoma (Beamish 1982) (often seen as macrostomus) -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:125 [ref. 31215], Renaud 2011:31 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Entosphenus macrostoma (Beamish 1982). Petromyzontidae. Distribution: Northwestern North America: Vancouver Island, British Columbia (Canada). Habitat: freshwater.

maculosus, Petromyzon Gronow [L. T.] in Gray 1854:2 [Catalogue of fish collected and described by Laurence Theodore Gronow; ref. 1911] England. No types known. Not treated by Renaud 2011:78 [ref. 31770]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Hardisty 1986:94 [ref. 24820], Kottelat 1997:29 [ref. 22952]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

major, Lampetra mitsukurii Hatta [S.] 1911:268, Pl. 9 (figs. 1-2, 5-6) [Annotationes Zoologicae Japonenses v. 7 (pt. 5); ref. 18252] Sapporo, Japan. Syntypes: whereabouts unknown. •Synonym of Lampetra japonica (Martens 1868) -- (Berg 1948:36 [ref. 12882]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:39 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

major, Petromyzon fluviatilis forma Smitt [F. A.] 1895:1189 [A history of Scandinavian fishes; ref. 4146] Appeared in Smitt's synonymy as, "A: forma major, pinnis dorsalibus minoribus, remotis." Regarded as infrasubspecific, not available. Not treated by Renaud 2011:58 [ref. 31770]. •In the synonymy of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952]). Infrasubspecific. Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae.

mariae, Lampetra Berg [L. S.] 1931:94, Pls. 1 (fig. 3), 4 (figs. 1-4) [Trudy Biologiceskoi Assodiamii Akademii Nauk S.S.S.R., Ezhegodnik, Zoologicheskogo Muzeya v. 32; ref. 16355] Kharkov River near Kharkov, Donets River basin, Ukraine. Syntypes: ZIN 23124 (36, now 18). Additional material: ZIN 6172 (5), 6173 (2, missing), 10762 (1), 15353 (2), 23156 (3), 23160 (1), 23408 (1), plus other collections. •Valid as Lampetra mariae Berg 1931 -- (Berg 1948:33 [ref. 12882]). •Valid as Eudontomyzon mariae (Berg 1931) -- (Holčík & Renaud 1986:165 [ref. 24822], Lelek 1987:32 [ref. 22962], Kottelat 1997:25 [ref. 22952], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:16 [ref. 23570], Holčik & Delić 2000:74 [ref. 40079], Yamazaki & Goto 2000:8 [ref. 24514], Levin 2001:849 [ref. 25938], Bogutskaya et al. 2001:42 [ref. 26178], Bilecenoğlu et al. 2002:8 [ref. 26753], Hanel 2003:44 [ref. 27894], Bogutskaya & Naseka 2004:19 [ref. 28183], Hanel & Lusk 2005:166 [ref. 28804], Levin & Holčík 2006:283 [ref. 40896], Fricke et al. 2007:10 [ref. 29533], Kottelat & Freyhof 2007:38 [ref. 29996], Ninua & Japoshvili 2008:163 [ref. 31251], Naseka et al. 2009:17 [ref. 30402], Lang et al. 2009:48 [ref. 31599], Renaud & Economidis 2010:42 [ref. 30894], Renaud 2011:41 [ref. 31770], Parin et al. 2014:14 [ref. 33547], Hanel & Andreska 2016:14 [ref. 34755], Dyldin et al. 2020:102 [ref. 37569], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625], Nagy et al. 2023:356 [ref. 40348]). Current status: Valid as Eudontomyzon mariae (Berg 1931). Petromyzontidae. Distribution: Southeastern Europe: Danube, Don and southern Volga river basins, Black Sea and Caspian Sea watersheds. Habitat: freshwater, brackish, marine.

marifuga, Lampetra richardsoni var. Beamish [R. J.] & Withler [R. E.] 1986:32 et seq., Fig. 2A, 2D, 2F, 2G [Indo-Pacific fish biology; ref. 26713] Described as a variety after 1960; therefore infrasubspecific and not available. Also appeared in later publications, e.g., Beamish et al. 2002:574 [ref. 26237] for Morrison Creek (Vancouver Island) population, but the name marifuga has never been validly published. Not treated by Renaud 2011:65 [ref. 31770]. •In the synonymy of Lampetra richardsoni Vladykov & Follett 1965 -- (Mecklenburg et al. 2002:65 [ref. 25968]). •In the synonymy of Occidentis ayresii (Günther 1870). Infrasubspecific. Current status: Synonym of Occidentis ayresii (Günther 1870). Petromyzontidae.

marinus, Petromyzon Linnaeus [C.] 1758:230 [Systema Naturae, Ed. X v. 1; ref. 2787] Basel, Switzerland [Original "in Mari Europæo", European seas]. No types known. Lectotype selected by Kottelat 1997:29 [ref. 22952] as the specimen illustrated by Gesner 1604:590 [specimen not in existence] which results in fixing the type locality. •Valid as Petromyzon marinus Linnaeus 1758 -- (Berg 1948:26 [ref. 12882], Vladykov 1973:2 [ref. 7159], Lee et al. 1980:35 [ref. 22416], Vladykov & Kott 1980:49 [ref. 39770], Vladykov in Whitehead et al. 1984:67 [ref. 13675], Smith 1986:40 [ref. 22186], Robins & Ray 1986:14 [ref. 23100], Hardisty 1986:94 [ref. 24820], Lelek 1987:25 [ref. 22962], Scott & Scott 1988:6 [ref. 25518], McAllister 1990:27 [ref. 14674], Page & Burr 1991:14 [ref. 18983], Jenkins & Burkhead 1994:172 [ref. 21581], Cochran & Marks 1995:409 [ref. 22409], Mrakovcic et al. 1995:183 [ref. 23079], Chereshnev 1996:598 [ref. 24659], Bianco et al. 1996:54 [ref. 26724], Kottelat 1997:29 [ref. 22952], Murdy et al. 1997:21 [ref. 23144], Reshetnikov et al. 1997:725 [ref. 24702], Reshetnikov 1998:19 [ref. 23570], McEachran & Fechhelm 1998:36 [ref. 23897], Scott & Crossman 1998:69 [ref. 24570], Fuller et al. 1999:19 [ref. 25838], Lyons et al. 2000:46 [ref. 26594], Yamazaki & Goto 2000:8 [ref. 24514], Alexeev & Kudersky 2001:135 [ref. 25204], Bilecenoğlu et al. 2002:172 [ref. 26753], Flescher & Martini in Collette & Klein-MacPhee 2002:17 [ref. 26158], Moore et al. 2003:166 [ref. 27076], Hanel 2003:44 [ref. 27894], Nelson et al. 2004:48 [ref. 27807], Bailey et al. 2004:60 [ref. 27882], Bogutskaya & Naseka 2004:21 [ref. 28183], Hanel & Lusk 2005:163 [ref. 28804], Scharpf 2005:6 [ref. 28940], Fricke 2007:25 [ref. 30577], Fricke et al. 2007:11 [ref. 29533], Kottelat & Freyhof 2007:44 [ref. 29996], Lang et al. 2009:48 [ref. 31599], Çevik et al. 2010:107 [ref. 42033], Lipej & Dulčić 2010:5 [ref. 36649], Møller et al. 2010:13 [ref. 31169], Mecklenburg et al. 2011:115 [ref. 31212], Page & Burr 2011:121 [ref. 31215], Page et al. 2013:48 [ref. 32708], Parin et al. 2014:16 [ref. 33547], Barbieri et al. 2015:34 [ref. 35029], Çiçek et al. 2015:142 [ref. 35151], Clavero et al. 2015:307 [ref. 36542], Hanel & Andreska 2016:5 [ref. 34755], Martins & Carneiro 2018:19 [ref. 36550], Robins et al. 2018:37 [ref. 35886], Almeida & Biscoito 2019:25 [ref. 37302], Ćaleta et al. 2019:143 [ref. 37026], Carneiro et al. 2019:15 [ref. 37250], Lorenzoni et al. 2019:251 [ref. 37108], Çiçek et al. 2020:242 [ref. 37644], Dyldin et al. 2020:78, 102 [ref. 37569], Kovačić et al. 2020:4 [ref. 37519], Tutman et al. 2020:1 [ref. 37301], Baikeche et al. 2021:959 [ref. 39080], Giglio & Sperone in Santín et al. 2021:208 [ref. 38223], Kovačić et al. 2021:8 [ref. 39014], Pereira et al. 2021:[10] 1991 [ref. 40490], Saad et al. 2021:22 [ref. 38437], Dyldin et al. 2022:[5] [ref. 39193], Simian et al. 2022:373 [ref. 40776], Antognazza et al. 2023:5 [ref. 40655], Çiçek et al. 2023:327 [ref. 40625], Deidun et al. 2023:215 [ref. 40771], Page et al. 2023:36 [ref. 40505], Saad et al. 2023:8 [ref. 40501], Shumka et al. 2023:39 [ref. 40747], Çiçek et al. 2024:25 [ref. 40789]). Current status: Valid as Petromyzon marinus Linnaeus 1758. Petromyzontidae. Distribution: Northwestern Atlantic: including northern Gulf of Mexico; North Atlantic: Greenland, Iceland; Baltic Sea; Mediterranean Sea; Black Sea [now extinct]; northeastern Atlantic: White Sea and northern Norway south to northern Morocco. Habitat: freshwater, brackish, marine.

matsubarai, Lethenteron Vladykov [V. D.] & Kott [E.] 1978:1793, Figs. 1-2, 4a, 5a, 6a [Canadian Journal of Zoology v. 56 (no. 8); ref. 8867] Shokotsu River, Hokkaido Island, Japan, 44°22'N, 143°20'E. Holotype: UBC 77-71. Paratypes: (6). •Valid as Lethenteron matsubarai Vladykov & Kott 1978 -- (Holčík 1986:227 [ref. 24819]). •Synonym of Lethenteron kessleri (Anikin 1905) -- (Renaud 2011:22 [ref. 31770] with question). •Synonym of Lethenteron mitsukurii (Hatta 1901) -- (Naseka & Renaud 2020:38 [ref. 37921]). •Synonym of Lethenteron reissneri (Dybowski 1869) -- (Sakai et al. 2024:20 [ref. 41696]). Current status: Synonym of Lethenteron reissneri (Dybowski 1869). Petromyzontidae. Habitat: freshwater.

maurari, Petromyzon DeKay [J. E.] 1840:12 [Documents of the Assembly of the State of New York 36th Session, v. 2 (no. 50); ref. 29723] Original not seen. Name only, not available (New York, U.S.A.). Nomen Nudum. Petromyzontidae.

maximus, Petromyzon Cuvier [G.] 1816:118 [Le Règne Animal; ref. 993] Apparently intended for Petromyzon marinus Linnaeus 1758, a misprint (see Kottelat 1997:29 [ref. 22952]). Not treated by Renaud 2011:78 [ref. 31770]. •In the synonymy of Petromyzon marinus Linnaeus 1758. Misspelling. Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae.

meridionale, Lethenteron Vladykov [V. D.], Kott [E.] & Pharand-Coad [S.] 1975:11, Figs. 1-3 [Publications in Zoology, National Museum of Natural Sciences, Ottawa No. 12; ref. 7480] Blue Springs Creek, tributary of Tennessee River, near Hillsboro, Coffee County, Tennessee, U.S.A. Holotype. Paratypes: (79) NMC, UMMZ 212777 (4). •Valid, but may be same as Lampetra aepyptera (Abbott 1860) -- (Lee et al. 1980:29 [ref. 22416]). •Valid as Lethenteron meridionale Vladykov, Kott & Pharand-Coad 1975 -- (Holčík 1986:227 [ref. 24819]). •Synonym of Lampetra aepyptera (Abbott 1860) -- (Etnier & Starnes 1993:96 [ref. 22809], Ross et al. 2001:70 [ref. 25978], Boschung & Mayden 2004:93 [ref. 27995]). Current status: Synonym of Lampetra aepyptera (Abbott 1860). Petromyzontidae. Habitat: freshwater.

minima, Lampetra (Entosphenus) Bond [C. E.] & Kan [T. T.] 1973:569, Figs. 1, 3 [Copeia 1973 (no. 3); ref. 12318] Near northern shore of Miller Lake, Oregon, U.S.A. Holotype: USNM 353919 [ex OSU 3180]. Paratypes: CAS 28706 (5), OSU 2875 (34), UMMZ 194169 (5), USNM 210967 (5). •Valid as Lampetra minima Bond & Kan 1973 -- (Lee et al. 1980:30 [ref. 22416], Lorion et al. 2000:1019 [ref. 25020], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:6 [ref. 28940]). •Valid as Entosphenus minimus (Bond & Kan 1973) -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:129 [ref. 31215], Renaud 2011:33 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Entosphenus minimus (Bond & Kan 1973). Petromyzontidae. Distribution: Western North America: upper Klamath River basin, Oregon (U.S.A.). Habitat: freshwater.

minor, Lampetra Grossinger [J. B.] 1794:207 [Universa historia physica regni Hungariae secundum tria regna naturae digesta; ref. 23027] Not available, not binominal. Not treated by Renaud 2011:38 [ref. 31770]. •In the synonymy of Eudontomyzon danfordi Regan 1911 -- (Renaud & Holčík 1986:147 [ref. 24821], Kottelat 1997:25 [ref. 22952]). Current status: Synonym of Eudontomyzon danfordi Regan 1911. Petromyzontidae.

minor, Lampetra mitsukurii Hatta [S.] 1911:268, Pl. 8 (figs. 3-4, 7-8) [Annotationes Zoologicae Japonenses v. 7 (pt. 5); ref. 18252] Gifu and Sapporo and other localities, Japan. No types known. Not treated by Renaud 2011:75 [ref. 31770]. •Synonym of Lampetra reissneri (Dybowski 1869) -- (Berg 1948:42 [ref. 12882], Okada 1961:273 [ref. 6363]). •Synonym of Lethenteron reissneri (Dybowski 1869) -- (Kottelat 2006:13 [ref. 28831], Dyldin & Orlov 2016:544 [ref. 34656]). •Synonym of Lethenteron mitsukurii (Hatta 1901) -- (Naseka & Renaud 2020:39 [ref. 37921]). Current status: Synonym of Lethenteron mitsukurii (Hatta 1901). Petromyzontidae. Habitat: freshwater.

minor, Petromyzon fluviatilis forma Smitt [F. A.] 1895:1189 [A history of Scandinavian fishes; ref. 4146] Appeared in Smitt's synonymy as, "B: forma minor, pinnis dorsalibus altioribus, approximatis." Regarded as infrasubspecific, not available. Not treated by Renaud 2011:63 [ref. 31770]. •In the synonymy of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Infrasubspecific. Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae.

mitsukurii, Lampetra Hatta [S.] 1901:24 [Annotationes Zoologicae Japonenses v. 4; ref. 14755] Sapporo, Hokkaido, Japan. Syntypes: ZMB 20638 (2). Type catalog: Paepke & Schmidt 1988:159 [ref. 21041]. Not treated by Renaud 2011:75 [ref. 31770]. •Synonym of Lampetra reissneri (Dybowski 1869) -- (Berg 1948:41 [ref. 12882], Okada 1961:273 [ref. 6363]). •Synonym of Lethenteron reissneri (Dybowski 1869) -- (Kottelat 2006:13 [ref. 28831], Dyldin & Orlov 2016:544 [ref. 34656] with question). •Valid as Lethenteron mitsukurii (Hatta 1901) -- (Naseka & Renaud 2020:50 [ref. 37921], Sakai et al. 2024:27 [ref. 41696]). Current status: Valid as Lethenteron mitsukurii (Hatta 1901). Petromyzontidae. Distribution: East Asia: Hokkaido Island to Shiga Prefecture and Honshu Island, Japan. Habitat: freshwater, brackish, marine.

morii, Lampetra Berg [L. S.] 1931:97, Pl. 5 (fig. 1) [Trudy Biologiceskoi Assodiamii Akademii Nauk S.S.S.R., Ezhegodnik, Zoologicheskogo Muzeya v. 32; ref. 16355] Upper Yalu River, ca. 40°42'N, 128°07'E, China/North Korea. Syntypes: ZIN 23145 (4). •Valid as Lethenteron morii (Berg 1931) -- (Lang et al. 2009:50 [ref. 31599]). •Valid as Lampetra morii Berg 1931 -- (Zhu 1995:3 [ref. 25213], Kim 1997:138 [ref. 24032], Kim & Park 2002:34 [ref. 25913], Choi et al. 2003:38, 466 [ref. 26218], Zhang et al. 2016:44 [ref. 34477], Chen et al. 2024:7 [ref. 41712]). •Valid as Eudontomyzon morii (Berg 1931) -- (Yamazaki & Goto 2000:8 [ref. 24514], Renaud 2011:43 [ref. 31770], Naseka & Renaud 2020:53 [ref. 37921]). Current status: Valid as Eudontomyzon morii (Berg 1931). Petromyzontidae. Distribution: East Asia: China and North Korea. Habitat: freshwater.

niger, Petromyzon Lacepède [B. G. E.] 1802:666, 667, Pl. 15 (fig. 2) [Histoire naturelle des poissons (Lacepède) v. 4; ref. 4929] Rivers Seine, Epte, and Audelle, Pont de l'Arche, France. No types known. Also appeared in Sonnini 1802:8, 67 [ref. 30461], with reference to the 'Petromyzon noir' of Lacepède. •Synonym of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952], Renaud 2011:63 [ref. 31770]). Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

nigricans, Petromyzon Lesueur [C. A.] 1818:385 [Transactions of the American Philosophical Society (New Series) v. 1 (art. 33); ref. 17515] North America. Syntypes: MNHN A-8039 (1). Type catalog: Bertin 1939:65 [ref. 20739]. Redescribed and illustrated by Lesueur 1827:4, Pl. 2 [ref. 17524]. Not treated by Renaud 2011:78 [ref. 31770]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Hardisty 1986:94 [ref. 24820], Renaud 2011:78 [ref. 31770]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae.

nigrum, Petromyzon Rafinesque [C. S.] 1820:251 [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. Also in Rafinesque 1820:84 [ref. 3592]. Objectively invalid; preoccupied by Petromyzon niger Lacepède 1802. 1°Homonym. Current status: Uncertain. Petromyzontidae.

ninae, Lethenteron Naseka [A. M.], Tuniyev [S. B.] & Renaud [C. B.] 2009:17, Figs. 2, 3a, 4a, 5, 6, 7a, 8 [Zootaxa No. 2198; ref. 30402] 43°48'35"N, 39°36'54"E, Shakhe River at Khartsyz, Black Sea basin, Sochi District, Russia. Holotype: ZISP 54431. Paratypes: CMNFI 2008-0059 (1); ZISP 54432 (2), 54433 (1), 54434 (8), 54435 (6), 54436 (6). Plus non-type material. •Questionably a synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Parin et al. 2014:15 [ref. 33547]). •Valid as Lampetra ninae (Naseka, Tuniyev & Renaud 2009) -- (Tutman et al. 2017:541 [ref. 35349], Kuljanishvili et al. 2020:[6] [ref. 37535], Pereira et al. 2021:[10] 1991 [ref. 40490]). •Questinably valid as Lampetra ninae (Naseka, Tuniyev & Renaud 2009) -- (Dyldin et al. 2022:[4] [ref. 39193]). •Valid as Lethenteron ninae Naseka, Tuniyev & Renaud 2009 -- (Renaud 2011:74 [ref. 31770], Dyldin et al. 2020:109 [ref. 37569], Naseka & Renaud 2020:53 [ref. 37921]). Current status: Valid as Lethenteron ninae Naseka, Tuniyev & Renaud 2009. Petromyzontidae. Distribution: Eastern Europe: Black Sea basin, western Transcaucasia (Russia and Abkhazia). Habitat: freshwater.

omalii, Petromyzon Beneden [P. J. van] 1857:551, Pl. [Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (2.Série) v. 2 [= v. 26] (no. 7); ref. 16781] Shores of Belgium. Syntypes: MNHN 0000-4161 (3). Type catalog: Bertin 1939:65 [ref. 20739]. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Hardisty 1986:249 [ref. 24820], Kottelat 1997:27 [ref. 22952], Renaud 2011:58 [ref. 31770]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

opisthodon, Lampetra Gratzianov [V. I.] 1907:18 [Dnevnik' Zoologicheskogo Otdelenya Obshchestva Lyubiteley Estestvoznaniya, Antropologii i Etnografii, Moskva v. 3 (no. 7-8) (for Dec. 1906); ref. 1870] Neva River near St. Petersburg, Russia. Syntypes: ZUMM P-1394 (3). Type catalog: Vasil'eva et al. 2001:11 [ref. 25714]. Also appeared as new in Gratzianow 1907:11 [ref. 1871]. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Hardisty 1986:250 [ref. 24820], Kottelat 1997:27 [ref. 22952], Renaud 2011:58 [ref. 31770]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

pacifica, Lampetra Vladykov [V. D.] 1973:206, Figs. 1-5, 7-9 [Journal of the Fisheries Research Board of Canada v. 30 (no. 2); ref. 7594] Clackamas River, tributary of the Willamette River, lower Columbia River basin, near Eastacada and Portland, Oregon, U.S.A. Holotype: NMC 1971-696. Paratypes: (43 adults, 190 larvae) CAS 13567-70 (1, 1, 5, 1); NMW 74956-57 (1, 1); UMMZ 132285 (1), 132860 (?8 of 16); remainder at NMC. See Swift et al. 1993:107 [ref. 22379]. •Synonym of Lampetra richardsoni Vladykov & Follett 1965 -- (Mecklenburg et al. 2002:66 [ref. 25968]). •Valid as Lampetra pacifica Vladykov 1973 -- (Lee et al. 1980:31 [ref. 22416], Page & Burr 1991:23 [ref. 18983], Yamazaki & Goto 2000:8 [ref. 24514], Reid et al. 2011:42 [ref. 31592], Renaud 2011:62 [ref. 31770], Page et al. 2013:48 [ref. 32708], Mateus et al. 2013:46 [ref. 32714], Carim et al. 2023:[14] [ref. 40103], Page et al. 2023:36 [ref. 40505]). •Valid as Occidentis pacifica (Vladykov 1973) -- (Carim et al. 2024:11 [ref. 41768]). Current status: Valid as Occidentis pacifica (Vladykov 1973). Petromyzontidae. Distribution: North America: Columbia River basin, Oregon (U. S. A.). Other populations as cf. pacifica [ref. 31592] or sp. [ref. 41768]. Habitat: freshwater.

planeri, Petromyzon Bloch [M. E.] 1784:47, Pl. 78 (fig. 3) [M. Marcus Elieser Bloch's ..., ausübenden Arztes zu Berlin, Oeconomische Naturgeschichte der Fische Deutschlands v. 3; ref. 19645] Creeks of Thüringen, Germany. Syntypes: ZMB 4686 (3). Type catalog: Paepke & Schmidt 1988:160 [ref. 21041], Paepke 1999:112 [ref. 24282]. On p. 39 of Bloch's Ichthyologie, v. 3 [ref. 21381]. •Valid as Petromyzon planerii Linnaeus 1758 -- (Herrera 1896:7 [ref. 39336]). •Synonym of Lampetra fluvialis (Linnaeus 1758) -- (Tsimbalov et al. 2018:117 [ref. 35816]). •Valid as Lampetra planeri (Bloch 1784) -- (Berg 1948:53 [ref. 12882], Hardisty 1986:279 [ref. 24820], Lelek 1987:39 [ref. 22962], Bianco 1992:183 [ref. 22319], Kottelat 1997:28 [ref. 22952], Bianco 1997:610 [ref. 26725], Reshetnikov et al. 1997:725 [ref. 24702], Reshetnikov 1998:17 [ref. 23570], Yamazaki & Goto 2000:8 [ref. 24514], Hanel 2003:45 [ref. 27894], Bogutskaya & Naseka 2004:20 [ref. 28183], Vassilev & Pehlivanov 2005:162 [ref. 28369], Hanel & Lusk 2005:168 [ref. 28804], Lunel & Andresja 2006:234 [ref. 28789], Kottelat & Freyhof 2007:41 [ref. 29996], Lang et al. 2009:48 [ref. 31599], Mateus et al. 2011:162 [ref. 31634], Bianco & Delmastro 2011:2 [ref. 31648], Mateus et al. 2013:37 [ref. 32714], Bianco 2013:2 [ref. 32897], Hanel & Andreska 2016:10 [ref. 34755], Tutman et al. 2017:541 [ref. 35349], Lorenzoni et al. 2019:251 [ref. 37108], Sperone et al. 2019:132 [ref. 36494], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[5] [ref. 39193]). Current status: Valid as Lampetra planeri (Bloch 1784). Petromyzontidae. Distribution: Western and Central Europe, south to Calabria, southern Italy. Habitat: freshwater.

plumbeus, Petromyzon Ayres [W. O.] 1855:[2] col. 4 [The Pacific [newspaper] v. 4 (nos 7-22); ref. 13428] San Francisco Bay, Parr Terminal, Point Richmond, 37°54'35"N, 122°13'12"W, California, U.S.A. Neotype: CAS 25935. Appeared first as above on 9 Feb.; then in Ayres 1855:28 [ref. 159]. Objectively invalid; preoccupied by Petromyzon plumbeus Shaw 1804, replaced by Petromyzon ayresii Günther 1870. Neotype designated by Vladykov & Follett 1958:54 [ref. 12288]. •Synonym of Lampetra ayresii (Günther 1870) -- (Scott & Crossman 1998:55 [ref. 24570] as ayresi, Renaud 2011:57 [ref. 31770]). •Synonym of Occidentis ayresii (Günther 1870). 1°Homonym. Current status: Synonym of Occidentis ayresii (Günther 1870). Petromyzontidae. Habitat: freshwater, brackish, marine.

plumbeus, Petromyzon Shaw [G.] 1804:263 [General zoology or systematic natural history; ref. 4015] Rivers Seine, Epte, and Audelle, Pont de l'Arche, France. Syntypes: whereabouts unknown. Unneeded new name for Petromyzon septoeuil Lacepède 1802. •Synonym of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

ponticus, Petromyzon Yashchenko [A. L.] 1896:99 [Trudy St.-Peterburgskogo Obscestva Estestvoispytatelej = Travaux de la Société des Naturalistes de St. Pétersbourg, Otdel Zoologii Fisiologii v. 25 (no. 2); ref. 20230] Not available, no description; from Noworossijsk, Russia. Not treated by Renaud 2011:41 [ref. 31770] •Questionably in the synonymy of Eudontomyzon mariae (Berg 1931) -- (Kottelat 1997:25 [ref. 22952]). Nomen Nudum. Current status: Synonym of Eudontomyzon mariae (Berg 1931). Petromyzontidae.

praecox, Lampetra fluviatilis forma Berg [L. S.] 1932:38, Figs. 32, 37 [Les poissons des eaux douces de l'U.R.S.S. Part 1; ref. 278] Ladoga and Onega lakes and their basins, Russia. Syntypes: (many) ZIN 6177 (2) Narova, 14861 (2), 29171 (6), 29184 (6+), 19185 (6+), 29195 (6+). Treated as infrasubspecific by Kottelat 1997:27 [ref. 22952] but a "form" can be subspecific. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Vladykov 1973:4 [ref. 7159], Hardisty 1986:250 [ref. 24820], Kottelat 1997:27 [ref. 22952]). •Hybrid between Lampetra fluviatilis (Linnaeus 1758) and L. planeri (Bloch 1784) -- (Reshetnikov et al. 1997:725 [ref. 24702]). Hybrid. Current status: Synonym of Lampetra. Petromyzontidae. Habitat: freshwater, brackish, marine.

praecox, Lampetra japonica forma Johansen [B. G.] 1935:1 [Systematiceskie Zametki po Materialam Zoologiceskogo Muzeja, Biologiceskogo Instituta pri Tomskom Gosudarstvennom Universitete Imeni V. V. Kiubyschevi v. 2 (no. 2); ref. 22003] Described as f. [forma] praecox. Not available, infrasubspecific. Possibly the same as Lampetra japonica praecox Berg 1932. •In the synonymy of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952]). Infrasubspecific. Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae.

reissneri, Petromyzon Dybowski [B. N.] 1869:958 [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 19; ref. 1169] Onon and Ingoda rivers, Amur River basin, Russia. Syntypes: BMNH 1971.7.19.37 [ex MGH] (1) Onon R., NMW 78112 (2), ZMB 7118 (1). Type catalog: Paepke & Schmidt 1988:160 [ref. 21041]. •Valid as Lampetra reissneri (Dybowski 1869) -- (Berg 1948:41 [ref. 12882], Okada 1961:273 [ref. 6363], Kuroda 1953:273 [ref. 39545], Sato in Masuda et al. 1984:2 [ref. 6441], Kawanabe & Mizuno 1989:38 [ref. 25598], Zhu 1995:3 [ref. 25213], Bogutskaya & Naseka 1996:10 [ref. 22798], Kim 1997:136 [ref. 24032], Reshetnikov 1998:18 [ref. 23570], Kim & Park 2002:32 [ref. 25913], Choi et al. 2003:38, 466 [ref. 26218], Zhang et al. 2016:44 [ref. 34477], Chen et al. 2024:7 [ref. 41712]). •Valid as Lethenteron reissneri (Dybowski 1869) -- (Holčík 1986:227 [ref. 24819], Yamazaki & Goto 1996:283 [ref. 22431], Chereshnev 1996:598 [ref. 24659], Yamazaki & Goto 1997:15 [ref. 24116], Nikiforov et al. 1997:330 [ref. 24694], Reshetnikov et al. 1997:725 [ref. 24702] but possibly a land-locked "form" of L. japonicum (Martens 1868), Sokolovskaya et al. 1998:7 [ref. 24670], Sato et al. 1998:30 [ref. 24972], Takahashi et al. 1998:119 [ref. 24973], Yue & Chen 1998:1 [ref. 26415], Yamazaki et al. 1999:49 [ref. 24156], Yamazaki & Goto 2000:8 [ref. 24514], Nakabo 2000:110 [ref. 25086], Sheiko & Fedorov 2000:14 [ref. 25650], Matsuura et al. 2000:15 [ref. 26000], Chereshnev et al. 2001:31 [ref. 26736], Pietsch et al. 2001:138 [ref. 25688], Bogutskaya et al. 2001:42 [ref. 26178], Nakabo 2002:111 [ref. 26001], Fedorov et al. 2003:12 [ref. 27579], Yamazaki et al. 2003:592 [ref. 27883], Bogutskaya & Naseka 2004:20 [ref. 28183], Kottelat 2006:13 [ref. 28831], Ocock et al. 2006:25 [ref. 28933], Kottelat & Freyhof 2007:43 [ref. 29996], Bogutskaya et al. 2008:313 [ref. 30085], Lang et al. 2009:48 [ref. 31599], Renaud 2011:75 [ref. 31770], Mateus et al. 2013:46 [ref. 32714], Parin et al. 2014:15 [ref. 33547], Renaud & Naseka 2015:75 [ref. 33833], Dyldin & Orlov 2016:544 [ref. 34656], Naseka & Renaud 2020:52 [ref. 37921], Dyldin et al. 2021:14 [ref. 38804], Dyldin & Orlov 2021:54 [ref. 38158], Dyldin et al. 2022:[5] [ref. 39193], Sakai et al. 2024:20 [ref. 41696]). Current status: Valid as Lethenteron reissneri (Dybowski 1869). Petromyzontidae. Distribution: Arctic and Pacific drainages: Russia, China, Mongolia, Korea and Japan. Habitat: freshwater, brackish, marine.

richardsoni, Lampetra Vladykov [V. D.] & Follett [W. I.] 1965:143, Figs. 3-9 [Journal of the Fisheries Research Board of Canada v. 22 (no. 1); ref. 9265] Smith Creek, Cultus Lake, British Columbia, Canada. Holotype: NMC 1964-57. Paratypes: CAS 35324-26 (4, 1, 1); NMW 74958 (1), 74967 (1); ROM 577 (1); UMMZ 97216 (2), 126160 (6), 126336 (4); UW 245 (11), 355 (6), 359 (9), 547 (5), 967 (1), 4668 (1), 4750 (9), 6233 (1); BCMP 569 (15). Other paratypes at BCPM, NMC,UBC, USNM. Type catalog: McAllister 1965:6 [ref. 22019]. See account ofmarifuga. •Valid as Lampetra richardsoni Vladykov & Follett 1965 -- (Lee et al. 1980:32 [ref. 22416], McAllister 1990:26 [ref. 14674], Page & Burr 1991:23 [ref. 18983], Scott & Crossman 1998:65 [ref. 24570], Mecklenburg et al. 2002:65 [ref. 25968], Beamish et al. 2002:573 [ref. 26237], Moyle 2002:104 [ref. 26449], Wydoski & Whitney 2003:38 [ref. 27816], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:6 [ref. 28940], McPhail 2007:12 [ref. 31199], Lang et al. 2009:55 [ref. 31599] as "Lampetra" richardsoni, Page & Burr 2011:131 [ref. 31215], Reid et al. 2011:42 [ref. 31592], Renaud 2011:65 [ref. 31770], Page et al. 2013:48 [ref. 32708], Mateus et al. 2013:46 [ref. 32714], Page et al. 2023:36 [ref. 40505]). •Synonym of Occidentis ayresii (Günther 1870) -- (Carim et al. 2024:11 [ref. 41768]). Current status: Synonym of Occidentis ayresii (Günther 1870). Petromyzontidae. Habitat: freshwater.

ruber, Petromyzon Lacepède [B. G. E.] 1800:99, 100, Pl. 1 (fig. 2) [Histoire naturelle des poissons (Lacepède) v. 2; ref. 2709] Seine River, France. No types known. Also appeared in Sonnini 1802:61 [ref. 30461]. Not treated by Renaud 2011:78 [ref. 31770]. •Questionably a synonym of Petromyzon marinus Linnaeus 1758 -- (Kottelat 1997:29 [ref. 22952]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae.

sanguisuga, Petromyzon Lacepède [B. G. E.] 1800:99, 101 [Histoire naturelle des poissons (Lacepède) v. 2; ref. 2709] Seine River, France. No types known. Also appeared in Sonnini 1802:63 [ref. 30461]. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Kottelat 1997:27 [ref. 22952]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

satoi, Lethenteron Sakai [H.], Iwata [A.] & Watanabe [K.] in Sakai, Iwata, Watanabe & Goto 2024:22, Figs. 6a-b, 7a, 8a, 9a, g, m, 10a, h, o [Ichthyological Research Online First; ref. 41696] Tsukisamu River, a tributary of Toyohira River, Ishikari River system, Toyohira, Sapporo, Hokkaido, Japan, 42°58'35"N, 141°22'42"E. Holotype: NSMT-P 147514. Paratypes: BIHM, HUMZ, KMNH, LBM, THM. •Valid as Lethenteron satoi Sakai, Iwata & Watanabe 2024. Current status: Valid as Lethenteron satoi Sakai, Iwata & Watanabe 2024. Petromyzontidae. Distribution: East Asia: Tsukisamu River drainage, Ishikari River basin, Hokkaido, Japan. Habitat: freshwater.

septentrionalis, Lampetra japonica Berg [L. S.] 1931:100, Pl. 5 (fig. 4) [Trudy Biologiceskoi Assodiamii Akademii Nauk S.S.S.R., Ezhegodnik, Zoologicheskogo Muzeya v. 32; ref. 16355] Onega River at Podporozhye, tributary to Onega Lake, Russia. Syntypes: ZIN 12159 (10, now 8). Additional material [missing]: ZIN 6308 (1), 7814 (1), 8545 (1), 9066 (3), 20800 (1), 20802 (1), and 39 more. •Synonym of Lampetra japonica (Martens 1868) -- (Berg 1948:36 [ref. 12882]). •Synonym of Lethenteron japonicum (Martens 1868) -- (Vladykov 1973:5 [ref. 7159], Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952], Renaud 2011:69 [ref. 31770], Parin et al. 2014:14 [ref. 33547], Dyldin & Orlov 2016:543 [ref. 34656], Naseka & Renaud 2020:26 [ref. 37921]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

septoeuil, Petromyzon Lacepède [B. G. E.] 1802:665, 667, Pl. 15 (fig. 1) [Histoire naturelle des poissons (Lacepède) v. 4; ref. 4929] Rivers Seine, Epte, and Audelle, Pont de l'Arche, France. Syntypes: whereabouts unknown. •Synonym of Lampetra planeri (Bloch 1784) -- (Kottelat 1997:28 [ref. 22952]). Current status: Synonym of Lampetra planeri (Bloch 1784). Petromyzontidae. Habitat: freshwater.

similis, Entosphenus Vladykov [V. D.] & Kott [E.] 1979:809, fig'd [Canadian Journal of Zoology v. 57 (no. 4); ref. 8774] Klamath River, California, U.S.A. Holotype: NMC 1975-1550. Paratypes: OS 2902 (1); CAS-SU 28783 (5), 35555 (10); and 12 other type-specimens. •Valid as Lampetra similis (Vladykov & Kott 1979) -- (Lee et al. 1980:33 [ref. 22416], Page & Burr 1991:21 [ref. 18983], Lorion et al. 2000:1019 [ref. 25020], Moyle 2002:100 [ref. 26449], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:6 [ref. 28940]). •Valid as Entosphenus similis Vladykov & Kott 1979 -- (Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:128 [ref. 31215], Renaud 2011:34 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Entosphenus similis Vladykov & Kott 1979. Petromyzontidae. Distribution: Western North America.: Oregon and California (U.S.A.). Habitat: freshwater.

soljani, Lampetra Tutman [P.], Freyhof [J.], Dulčić [J.], Glamuzina [B.] & Geiger [M. F.] 2017:536, Figs. 3-8 [Zootaxa 4273 (no. 4); ref. 35349] Side-arm of Neretva River east of Čapljina, Bosnia and Herzegovina, 43.106458 17.709536. Holotype: ZFMK-ICH 103666. Paratypes: FSJF. •Valid as Lampetra soljani Tutman, Freyhof, Dulčić, Glamuzina & Geiger 2017 -- (Ćaleta et al. 2019:143 [ref. 37026], Tutman et al. 2020:1 [ref. 37301], Pereira et al. 2021:[10] 1991 [ref. 40490], Rüber et al. 2023:4 [ref. 40472], Shumka et al. 2023:38 [ref. 40747]). Current status: Valid as Lampetra soljani Tutman, Freyhof, Dulčić, Glamuzina & Geiger 2017. Petromyzontidae. Distribution: Southeastern Europe: Neretva River drainage, Adriatic catchment (Croatia, Bosnia and Herzegovina, Albania). Habitat: freshwater.

spadicea, Lampetra Bean [T. H.] 1887:374, Pl. 20 (fig. 6) [Proceedings of the United States National Museum v. 10 (no. 637); ref. 14471] Guanajuato State, Mexico [possibly Jacona, in Michoacán State] Holotype (unique): USNM 38005. Larval specimen mentioned but not definitely included in this species; USNM 38005 shows 8 specimens. See Renaud 2011:83 [ref. 31770] for comments on the type locality. •Valid as Lampetra spadicea Bean 1887 -- (Herrera 1896:7 [ref. 39336], Espinosa Pérez et al. 1993:7 [ref. 22290], Cochran et al. 1996:174 [ref. 22597], Lyons et al. 1996:366 [ref. 25521], Castro-Aguirre et al. 1999:36 [ref. 24550], Nelson et al. 2004:48 [ref. 27807], Scharpf 2005:6 [ref. 28940], Miller 2006:77 [ref. 28615]). •Valid as Tetrapleurodon spadiceus (Bean 1887) -- (Yamazaki & Goto 2000:8 [ref. 24514], Gill et al. 2003:689 [ref. 27254], Renaud 2011:83 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505], Fricke et al. 2024:58 [ref. 41622]). Current status: Valid as Tetrapleurodon spadiceus (Bean 1887). Petromyzontidae. Distribution: Southern North America: Lago de Chapala and tributaries, Guanajuato, Jalisco and Michoacán (Pacific slope of Mexico) endemic. Habitat: freshwater.

stankokaramani, Eudontomyzon vladykovi Karaman [M. S.] 1974:1 [Folia Balcanica, Zavod za Ribarstvo ba NR Makedonija. Skopje. v. 3 (no. 5); ref. 7431] Istocka Reka brook, neat Istok, and Rastavicki Pateek brook, Ohrid-Drim-Skadar system, Serbia. Holotype: Author's coll. (apparently lost). Paratypes: Author's coll. (10). •Synonym of Eudontomyzon mariae (Berg 1931) -- (Holčík & Renaud 1986:165 [ref. 24822], Naseka et al. 2009:17 [ref. 30402], Renaud 2011:41 [ref. 31770] with question). •Valid as Eudontomyzon stankokaramani Karaman 1974 -- (Kottelat 1997:26 [ref. 22952], Kottelat & Freyhof 2007:37 [ref. 29996], Lang et al. 2009:48 [ref. 31599], Renaud & Economidis 2010:37 [ref. 30894], Pereira et al. 2021:[10] 1991 [ref. 40490], Shumka et al. 2023:38 [ref. 40747]). Current status: Valid as Eudontomyzon stankokaramani Karaman 1974. Petromyzontidae. Distribution: Southeastern Europe: Macedonia, Albania, Kosovo and Montenegro. Habitat: freshwater.

tridentatus, Petromyzon Richardson [J.] (ex Gairdner) 1836:293 [Fauna Boreali-Americana Part 3; ref. 3731] Walamet Falls [now Willamette], Columbia River basin, western North America. No types known. Authorship sometimes seen as Gairdner in Richardson. •Valid as Lampetra tridentata (Richardson 1836) -- (Eschmeyer & Herald 1983:12 [ref. 9277], McAllister 1990:27 [ref. 14674], Page & Burr 1991:20 [ref. 18983], Swift et al. 1993:107 [ref. 22379], Lee et al. 1980:34 [ref. 22416], Ruiz-Campos & Gonzales-Guzman 1996:144 [ref. 23047], Castro-Aguirre et al. 1999:36 [ref. 24550], Ruiz-Campos et al. 2000:67 [ref. 24940], Lorion et al. 2000:1019 [ref. 25020], Sheiko & Fedorov 2000:14 [ref. 25650], Beamish 2001:127 [ref. 25423], Pietsch et al. 2001:138 [ref. 25688], Mecklenburg et al. 2002:61 [ref. 25968], Beamish et al. 2002:574 [ref. 26237], Moyle 2002:96 [ref. 26449], Wydoski & Whitney 2003:33 [ref. 27816] with author as Gairdner, Nelson et al. 2004:48 [ref. 27807] with author as Gairdner, Love et al. 2005:1 [ref. 37547], Scharpf 2005:6 [ref. 28940] with author as Gairdner, Miller 2006:78 [ref. 28615], McPhail 2007:16 [ref. 31199] with author as Gairdner). •Valid as Entosphenus tridentatus (Richardson 1836) -- (Okada 1961:272 [ref. 6363], Sato in Masuda et al. 1984:2 [ref. 6441], Chereshnev 1996:598 [ref. 24659], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:15 [ref. 23570], Scott & Crossman 1998:42 [ref. 24570], Yamazaki & Goto 2000:8 [ref. 24514], Nakabo 2000:110 [ref. 25086], Sheiko & Fedorov 2000:14 [ref. 25650], Bogutskaya et al. 2001:42 [ref. 26178], Nakabo 2002:110 [ref. 26001], Bogutskaya & Naseka 2004:19 [ref. 28183], Lang et al. 2009:48 [ref. 31599], Mecklenburg et al. 2011:115 [ref. 31212], Page & Burr 2011:125 [ref. 31215], Renaud 2011:35 [ref. 31770], Page et al. 2013:48 [ref. 32708], Parin et al. 2014:13 [ref. 33547], Pietsch & Orr 2015:12 [ref. 34694], Dyldin & Orlov 2016:543 [ref. 34656], Del Moral-Flores et al. 2016:605 [ref. 34923], Kells et al. 2016:60 [ref. 35888], Burton & Lea 2019:26 [ref. 37205], Dyldin et al. 2020:78 [ref. 37569], Dyldin et al. 2021:13 [ref. 38804], Dyldin & Orlov 2021:54 [ref. 38158], Love et al. 2021:12 [ref. 39279], Dyldin et al. 2022:[4] [ref. 39193], Page et al. 2023:36 [ref. 40505], Fricke et al. 2024:58 [ref. 41622]). Current status: Valid as Entosphenus tridentatus (Richardson 1836). Petromyzontidae. Distribution: North Pacific, anadromous: Japan north to Bering Sea; Alaska (U.S.A.) south to Pacific coast of northern Baja California (Mexico), including Revillagigedo Islands (Mexico). Habitat: freshwater, brackish, marine.

typica, Lampetra (Lampetra) fluviatilis forma Berg [L. S.] 1931:109 [Trudy Biologiceskoi Assodiamii Akademii Nauk S.S.S.R., Ezhegodnik, Zoologicheskogo Muzeya v. 32; ref. 16355] Strelka River, Russia, Gulf of Finland. No types known. •Synonym of Lampetra fluviatilis (Linnaeus 1758) -- (Vladykov 1973:4 [ref. 7159]). Current status: Synonym of Lampetra fluviatilis (Linnaeus 1758). Petromyzontidae. Habitat: freshwater, brackish, marine.

unicolor, Ammocoetes DeKay [J. E.] 1842:383, Pl. 79 (fig. 250) [Zoology of New-York; ref. 1098] Lake Champlain and New York, U.S.A. Syntypes: whereabouts unknown. •Synonym of Ichthyomyzon fossor Reighard & Cummins 1916 -- (Smith 1986:35 [ref. 22186], Scott & Crossman 1998:51 [ref. 24570]). Current status: Synonym of Ichthyomyzon fossor Reighard & Cummins 1916. Petromyzontidae. Habitat: freshwater.

unicolor, Petromyzon marinus Gage [S. H.] 1928:163, Fig 1; Pls. 1-2 [The lampreys of New York State; ref. 21352] Cayuga, Seneca, Ontario and Erie lakes. No types known. Not treated by Renaud 2011:78 [ref. 31770]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Hardisty 1986:95 [ref. 24820], Scott & Crossman 1998:70 [ref. 24570]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae.

unicuspis, Ichthyomyzon Hubbs [C. L.] & Trautman [M. B.] 1937:53, Pls. 1 (fig.A), 2 (figs.A, B) [Miscellaneous Publications, Museum of Zoology, University of Michigan No. 35; ref. 11704] Swan Creek, 3 miles above the lower Maumee River, Toledo, Ohio, U.S.A. Holotype: UMMZ 107040. Paratypes: AMNH 1550 (2), 7607 (1); FMNH 6307-09 (1, 1, 2), 6462 (3), 8960 (1); OSM; UMMZ (many); USNM 7442 (disintegrated), 7479 (1), 11060 (1), 12518 (2), 17762 (2), 32663 (1), 63029 (1), 64833 (2), 64915 (8), 65294 (1), 67009 (2), 68725-26 (2, 1), 68914 (1), 78162 (1); UWM; Milwaukee; Ohio. Type catalog: Ibarra & Stewart 1987:49 [ref. 12367]. •Valid as Ichthyomyzon unicuspis Hubbs & Trautman 1937 -- (Lee et al. 1980:20 [ref. 22416], Smith 1986:37 [ref. 22186], McAllister 1990:26 [ref. 14674], Page & Burr 1991:16 [ref. 18983], Etnier & Starnes 1993:94 [ref. 22809], Cochran & Marks 1995:409 [ref. 22409], Stauffer et al. 1995:25 [ref. 23376], Chereshnev 1996:598 [ref. 24659], Scott & Crossman 1998:52 [ref. 24570], Fuller et al. 1999:18 [ref. 25838], Lyons et al. 2000:20 [ref. 26594], Renaud & de Ville 2000:333 [ref. 24887], Yamazaki & Goto 2000:8 [ref. 24514], Ross et al. 2001:67 [ref. 25978], Nelson et al. 2004:48 [ref. 27807], Bailey et al. 2004:58 [ref. 27882], Scharpf 2005:5 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:121 [ref. 31215], Robison et al. 2011:458 [ref. 31590], Renaud 2011:53 [ref. 31770], Page et al. 2013:48 [ref. 32708], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon unicuspis Hubbs & Trautman 1937. Petromyzontidae. Distribution: North America: south-central Canada and eastern U.S.A. Habitat: freshwater.

variegata, Lampetra Tilesius [W. G. von] 1811:247 [Mémoires de l'Académie Impériale des Sciences de Sankt Pétersbourg (5e Série) v. 3; ref. 4408] Not available, non-binominal. •In the synonymy of Lethenteron camtschaticum (Tilesius 1811) -- (Kottelat 1997:28 [ref. 22952]). Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae.

variegata, Petromyzon Tilesius [W. G. von] 1811:247 [Mémoires de l'Académie Impériale des Sciences de Sankt Pétersbourg (5e Série) v. 3; ref. 4408] Bolschaya River, Kamchatka, Russia. No types known. •Questionably the same as Lethenteron japonicum (Martens 1868) -- (Holčík 1986:199 [ref. 24819], Reshetnikov 1998:17 [ref. 23570]). •Synonym of Lethenteron camtschaticum (Tilesius 1811) based on placement of japonicus, Dyldin & Orlov 2016:543 [ref. 34656]. Current status: Synonym of Lethenteron camtschaticum (Tilesius 1811). Petromyzontidae. Habitat: freshwater, brackish, marine.

vladykovi, Eudontomyzon danfordi Oliva [O.] & Zanandrea [G.] 1959:1 [Doriana, Genova v. 2 (no. 98); ref. 18496] Affluent of Orava Reservoir, Danube River basin, Territory of Orava, northwestern Slovakia, Czechoslovakia. Neotype: SNMB Ry 472 = LF 41858. Non-types: NMW 50013 (1), 50020 (1), 76823 (4). Type catalog: Blahák 1991:203 [ref. 20023]. Also appeared in Zanandrea 1960 [ref. 11963]; see nomenclatural notes in Kottelat 1997:26 [ref. 22952]. For authorship and date of publication see Holčík 1963:51 et seq. [ref. 20741]. Neotype designated by Holčík 1963:57 [ref. 20741], but a neotype is not needed if other syntypes or the specimen from Graz, Austria, that was the basis for the oral disk drawing in Oliva & Zanandrea 1959, are available. •Valid as Lampetra (Eudontomyzon) vladykovi (Oliva & Zanandrea 1959) -- (Balon & Holčik 1964:191 [ref. 41156]). •Synonym of Eudontomyzon danfordi Regan 1911 (in part) -- (Renaud & Holčík 1986:147 [ref. 24821]). •Synonym of Eudontomyzon mariae (Berg 1931) -- (Holčík & Renaud 1986:165 [ref. 24822], Naseka et al. 2009:17 [ref. 30402], Renaud 2011:40 [ref. 31770] with queston). •Valid as Eudontomyzon vladykovi Oliva & Zanandrea 1959 -- (Kottelat 1997:26 [ref. 22952], Kottelat & Freyhof 2007:39 [ref. 29996], Lang et al. 2009:48 [ref. 31599], Ćaleta et al. 2015:21 [ref. 34877], Hanel & Andreska 2016:14 [ref. 34755], Ćaleta et al. 2019:142 [ref. 37026], Tutman et al. 2020:1 [ref. 37301], Pereira et al. 2021:[10] 1991 [ref. 40490], Nagy et al. 2023:356 [ref. 40348]). Current status: Valid as Eudontomyzon vladykovi Oliva & Zanandrea 1959. Petromyzontidae. Distribution: Southeastern Europe: Danube River basin. Habitat: freshwater.

wagneri, Petromyzon Kessler [K. F.] 1870:207, Pl. 3 (figs. 4-5) [Trudy St.-Peterburgskogo Obscestva Estestvoispytatelej = Travaux de la Société des Naturalistes de St. Pétersbourg. v. 1 (no. 2); ref. 18395] Volga River between Tver [Tvertsa] and Astrakhan, Russia, 46°21'N, 48°03'E. Syntypes: (10) NMW 61053 (1), SMNS 2398 (1), ZIN 2407 (2). Type catalog: Fricke 1995:17 [ref. 28100], Fricke 2005:54 [ref. 29864]. Also published as new in Kessler 1870:302 [67] [ref. 21480]. •Valid as Caspiomyzon wagneri (Kessler 1870) -- (Berg 1948:28 [ref. 12882], Holčík 1986:119 [ref. 24819], Lelek 1987:28 [ref. 22962], Coad 1995:6 [ref. 23608], Reshetnikov et al. 1997:724 [ref. 24702], Reshetnikov 1998:15 [ref. 23570], Coad 1998:102 [ref. 23869], Yamazaki & Goto 2000:8 [ref. 24514], Bogutskaya et al. 2001:42 [ref. 26178], Bogutskaya & Naseka 2004:18 [ref. 28183], Fricke et al. 2007:10 [ref. 29533], Kottelat & Freyhof 2007:35 [ref. 29996], Ninua & Japoshvili 2008:163 [ref. 31251], Lang et al. 2009:52 [ref. 31599], Esmaeili et al. 2010:365 [ref. 33391], Renaud 2011:24 [ref. 31770], Jouladeh-Roudbar et al. 2015:858 [ref. 34062], Çiçek et al. 2015:142 [ref. 35151], Esmaeili et al. 2017:23 [ref. 35254], Esmaeili et al. 2018:6 [ref. 36089], Dyldin et al. 2020:78, 102 [ref. 37569], Jouladeh-Roudbar et al. 2020:6 [ref. 37983], Kaya et al. 2020:328 [ref. 37582], Kuljanishvili et al. 2020:[6] [ref. 37535], Pereira et al. 2021:[10] 1991 [ref. 40490], Dyldin et al. 2022:[4] [ref. 39193], Çiçek et al. 2023:327 [ref. 40625], Çiçek et al. 2024:24 [ref. 40789]). Current status: Valid as Caspiomyzon wagneri (Kessler 1870). Petromyzontidae. Distribution: Eurasia: Caspian Sea basin (Kazakhstan, Russia, Azerbaijan, Iran and Turkmenistan). Habitat: freshwater, brackish, marine.

wilderi, Lampetra Gage [S. H.] in Jordan & Evermann 1896:13 [Bulletin of the United States National Museum No. 47; ref. 2443] Cayuga Lake, western New York, U.S.A. No types known. Authorship is perhaps Jordan & Evermann (ex Gage). •Synonym of Lampetra appendix (DeKay 1842) -- (Smith 1986:40 [ref. 22186]). •Synonym of Lampetra lamottei (Lesueur 1827) -- (Scott & Crossman 1998:64 [ref. 24570]). •Synonym of Lampetra appendix (DeKay 1842), but a valid subspecies -- (Fuller et al. 1999:19 [ref. 25838]). •Valid as Lethenteron wilderi (Gage 1896) -- (Holčík 1986:227 [ref. 24819]). •Synonym of Lethenteron appendix (Lesueur 1827) -- (Page & Burr 2011:129 [ref. 31215], Renaud 2011:68 [ref. 31770] witrh question). Current status: Synonym of Lethenteron appendix (DeKay 1842). Petromyzontidae. Habitat: freshwater.

wilsoni, Oceanomyzon Fowler [H. W.] 1908:462, Fig. 1 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 59 (for 1907); ref. 1378] Atlantic. Holotype (unique): ANSP 375. Type catalog: Böhlke 1984:140 [ref. 13621]. •Synonym of Petromyzon marinus Linnaeus 1758 -- (Vladykov 1973:2 [ref. 7159], Hardisty 1986:95 [ref. 24820], Renaud 2011:78 [ref. 31770]). Current status: Synonym of Petromyzon marinus Linnaeus 1758. Petromyzontidae. Habitat: freshwater, brackish, marine.

zanandreai, Lampetra Vladykov [V. D.] 1955:216, Pls. 1, 2a, 3a, 4b-c [Copeia 1955 (no. 3); ref. 12535] Guà di Lonigo River, Adige River system, near Venice, Italy. Holotype: NMC 1986-0001 [ex Prov. Dept. of Fish., Quebec]. Paratypes: BMNH 1956.9.1.1-2 (2); ?NMC [ex Prov. Dept. of Fish., Quebec] (17). •Valid as Lethenteron zanandreai (Vladykov 1955) -- (Bianco 1986:237 [ref. 24824], Lelek 1987:35 [ref. 22962], Bianco 1988:147 [ref. 22383], Bianco 1992:183 [ref. 22319], Mrakovcic et al. 1995:183 [ref. 23079], Kottelat 1997:29 [ref. 22952], Yamazaki & Goto 2000:8 [ref. 24514], Lang et al. 2009:50 [ref. 31599], Renaud 2011:77 [ref. 31770], Ćaleta et al. 2015:70 [ref. 34877], Tutman et al. 2020:2 [ref. 37301]). •Valid as Lampetra zanandreai Vladykov 1955 -- (Kottelat & Freyhof 2007:42 [ref. 29996], Kottelat & Freyhof 2009:76 [ref. 30320], Naseka et al. 2009:23 [ref. 30402], Bianco & Delmastro 2011:2 [ref. 31648], Bianco 2013:2 [ref. 32897], Tutman et al. 2017:541 [ref. 35349], Lorenzoni et al. 2019:251 [ref. 37108], Pereira et al. 2021:[10] 1991 [ref. 40490], Rüber et al. 2023:4 [ref. 40472]). Current status: Valid as Lampetra zanandreai Vladykov 1955. Petromyzontidae. Distribution: Southern Europe: Italy, Slovenia, Croatia and Bosnia and Herzegovina. Habitat: freshwater.