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 Polypteridae: [ 25 ] records

ansorgii, Polypterus Boulenger [G. A.] 1910:424 [Annals and Magazine of Natural History (Series 8) v. 6 (no. 34); ref. 14430] Corbal River at Tchitoli, Guinea-Bissau. Syntypes: (3) BMNH 1910.9.13.4 (1). Type catalog: Moritz & Britz 2019:[15] [ref. 36886]. •Valid as Polypterus ansorgii Boulenger 1910 -- (Gosse 1984:21 [ref. 6169], Lévêque et al. 1989:113 [ref. 26480] as ansorgei, Gosse in Lévêque et al. 1990:81 [ref. 21589], Lévèque et al. 1991:133 [ref. 31367] as ansorgei, Poll & Gosse 1995:28 [ref. 24781] as ansorgei, Britz 2004:184 [ref. 27800], Moritz & Britz 2019:[15] [ref. 36886]). Current status: Valid as Polypterus ansorgii Boulenger 1910. Polypteridae. Distribution: Africa: Guinea-Bissau and Senegal. Record from upper Niger based on misidentification. Habitat: freshwater.

arnaudii, Polypterus Duméril [A. H. A.] 1870:394, Pl. 23 (fig. 2) [Histoire naturelle des poissons ou ichthyologie générale v. 2; ref. 1147] Not available, name not originally treated as valid (Art. 11.5 of the Code). Polypterus Arnaudii used on Plate 23, but on p. 11 of Table of plates and text page 394-395 treated as synonym of Polypterus senegalus ("sous le nom de Pol. Arnaudii"). •In the synonymy of Polypterus senegalus Cuvier 1829 -- (Gosse 1984:27 [ref. 6169]). Current status: Synonym of Polypterus senegalus Cuvier 1829. Polypteridae.

bichir, Polypterus Lacepède [B. G. E.] 1803:340 [Histoire naturelle des poissons (Lacepède) v. 5; ref. 4930] Nile River, Egypt. Lectotype: MNHN 0000-5761. Paralectotypes: MNHN 0000-5806 (1). Type catalog: Bertin 1940:246-247 [ref. 293] as holotype (MNHN 5761) and paratypes, Moritz & Britz 2019:[19] [ref. 36886]. Appeared first in detail in Geoffroy St. Hilaire 1802:97, Pl. 5 (fig. 1) [ref. 4183] and 1802:57-68, Pl. 5 (figs. 1-3) [ref. 26737], but generic name not Latinized (Polyptère bichir). Lectotype selected by Eschmeyer 1998:220 [ref. 23416]. •Valid as Polypterus bichir Lacepède 1803, subspecies birchir -- (Seegers et al. 2003:28 [ref. 28087]). •Valid as Polypterus bichir Lacepède 1803 -- (Gosse 1984:19 [ref. 6169], Gosse in Lévêque et al. 1990:81 [ref. 21589], Poll & Gosse 1995:28 [ref. 24781], Britz 2004:185 [ref. 27800], Neumann et al. 2016:303 [ref. 35036], Moritz & Britz 2019:[19] [ref. 36886]). Current status: Valid as Polypterus bichir Lacepède 1803. Polypteridae. Distribution: Africa: widespread in North Africa, Nile River system, Chad, Niger, Volta and Senegal; Gambia River, Casamanche River and Geba River; Congo Basin. Habitat: freshwater.

buettikoferi, Polypterus Steindachner [F.] 1891:179 [Notes from the Leyden Museum v. 13 (no. 3) (art. 23); ref. 18788] Mahfa River; Solymah River; swamps at Buluma and Juring, Liberia, western Africa. Lectotype: RMNH 5396 (largest of 2). Paralectotypes: RMNH 5332 (5), 5371 (2), 5396 (1). Species originally spelled as büttikoferi, correction mandatory. •Synonym of Polypterus palmas Ayres 1850 -- (Gosse 1984:24 [ref. 6169], Paugy et al. 1990:332 [ref. 26477] as büttikoferi, Gosse in Lévêque et al. 1990:85 [ref. 21589]). •Synonym of Polypterus palmas Ayres 1850, but a valid subspecies buettikoferi Steindachner 1891 -- (Hanssens et al. 1995:701 [ref. 22406], Britz 2004:184 [ref. 27800], Schliewen & Schäfer 2006:32 [ref. 28498]). Current status: Synonym of Polypterus palmas Ayres 1850. Polypteridae. Habitat: freshwater.

calabaricus, Erpetoichthys Smith [J. A.] 1865:278 [Proceedings of the Royal Physical Society of Edinburgh v. 3 (for 22 Mar. 1865); ref. 4060] Old Calabar River, West Africa. Syntypes: (2) apparently lost. Non-types: MNHN 0000-4599 (2). Type catalog: Bertin 1940:247 [ref. 293] but not dating to original. Two specimens were associated with the first description and they are apparently lost (Swinney & Heppell 1982 [ref. 20746]). Mentioned in Anonymous [ref. 20731], also appeared in Smith 1866:460 [ref. 20732]; see Swinney & Heppell 1982 [ref. 20746]. •Valid as Calamoichthys calabaricus (Smith 1865) -- (Gosse 1984:18 [ref. 6169]). •Valid as Erpetoichthys calabaricus Smith 1865 -- (Swinney & Heppell 1982:98 [ref. 20746], Gosse in Lévêque et al. 1990:86 [ref. 21589], Poll & Gosse 1995:77 [ref. 24781], Britz 2007:173 [ref. 30014] dated 1866, Moritz & Britz 2019:[6] [ref. 36886]). Current status: Valid as Erpetoichthys calabaricus Smith 1865. Polypteridae. Distribution: West-central Africa: Nigeria to Cameroon. Habitat: freshwater.

congicus, Polypterus Boulenger [G. A.] 1898:418 [Annals and Magazine of Natural History (Series 7) v. 2 (no. 11) (art. 50); ref. 14681] Stanley [Boyoma] Falls, Congo. Holotype: BMNH 1897.9.30.28. Paratypes: (3, whereabouts unknown). Type catalog: Moritz & Britz 2019:[29] [ref. 36886]. •Synonym of Polypterus endlicherii Heckel 1847, but a valid subspecies -- (Gosse 1984:23 [ref. 6169] as endlicheri, Gosse in Lévêque et al. 1990:84 [ref. 21589]). •Valid as Polypterus congicus Boulenger 1898 -- (Moritz & Britz 2019:[29] [ref. 36886]). Current status: Valid as Polypterus congicus Boulenger 1898. Polypteridae. Distribution: Africa: Congo River system. Habitat: freshwater.

congicus, Polypterus palmas Daget [J.] 1962:48 [Mémoires de l'Institut français d'Afrique Noire No. 65; ref. 5866] Type catalog: Derijst 1991:64 [ref. 21528]. Objectively invalid; preoccupied by Polypterus congicus Boulenger 1898, replaced by Polypterus polli Gosse 1988. As name only in Poll 1954:285 [ref. 21234] and Daget 1958:2518 [ref. 21235]. See also Daget 1962:48 [ref. 5866]. •Treated as a synonym of Polypterus palmas Ayres 1850, but a valid subspecies -- (Gosse 1984:25 [ref. 6169]). •Synonym of Polypterus polli Gosse 1988. 1°Homonym. Current status: Synonym of Polypterus polli Gosse 1988. Polypteridae. Habitat: freshwater.

delhezi, Polypterus Boulenger [G. A.] 1899:61, Pl. 30 (fig. 2) [Annales du Musee du Congo (Ser. Zoologie) v. 1 (fasc. 4); ref. 549] Lake Leopold and New Antwerp, Upper Congo River. Lectotype: MRAC 422. Paralectotypes: BMNH 1899.2.20.17 (1). Type catalog: Moritz & Britz 2019:[34] [ref. 36886]. Lectotype selected by Boulenger 1909:13-14 [ref. 14364]. •Valid as Polypterus delhezi Boulenger 1899 -- (Gosse 1984:21 [ref. 6169], Britz 2004:184 [ref. 27800], Moritz & Britz 2019:[34] [ref. 36886], Stiassny et al. 2021:1686 [ref. 39000]). Current status: Valid as Polypterus delhezi Boulenger 1899. Polypteridae. Distribution: Western-central Africa: Congo River system. Habitat: freshwater.

endlicherii, Polypterus Heckel [J. J.] 1847:310, Pl. 22 (fig. 1) [Reisen in Europa, Asien und Africa v. 2 (pt 3); ref. 2068] White Nile River, Sudan. Holotype: NMW 63024. Type catalog: Moritz & Britz 2019:[38] [ref. 36886]. Original spelling is endlicherii. Also appeared as Polypterus endlicheri without description in Heckel 1847:46 [ref. 26435]. •Valid as Polypterus endlicherii Heckel 1847, subspecies endlicherii -- (Lévêque et al. 1989:113 [ref. 26480] dated 1849). •Valid as Polypterus endlicherii Heckel 1847 -- (Gosse 1984:22 [ref. 6169] as endlicheri, Gosse in Lévêque et al. 1990:84 [ref. 21589] as endlicheri, Poll & Gosse 1995:28 [ref. 24781] as endlicheri, Dankwa et al. 1999:11 [ref. 28023] as endlicheri, De Vos et al. 2001:129, 131 [ref. 26059] dated 1849 as endlicheri, Britz 2004:184 [ref. 27800] as endlicheri, Hauber et al. 2011:81 [ref. 31428] as endlicheri, Neumann et al. 2016:303 [ref. 35036], Moritz & Britz 2019:[38] [ref. 36886], Fermon et al. 2022:110 [ref. 39448]). Current status: Valid as Polypterus endlicherii Heckel 1847. Polypteridae. Distribution: Africa; widespread in Nile, Chad and niger basins, and in coastal rivers of West Africa. Habitat: freshwater.

erpetoideus, Polypterus Smith [J. A.] in Anonymous 1865:2 [Daily Review, Edinburgh No. 1242; ref. 20731] Old Calibar River, West Africa. No types known. Polypterus erpetoideus and Erpetoichthys calabaricus were two names proposed for the same taxon; Swinney & Heppell 1982 [ref. 20746] serve as first revisers selecting Erpetoichthys calabaricus. •Objective synonym of Erpetoichthys calabaricus Smith 1865 -- (Moritz & Britz 2019:[6] [ref. 36886]). Current status: Synonym of Erpetoichthys calabaricus Smith 1865. Polypteridae. Habitat: freshwater.

katangae, Polypterus bichir Poll [M.] 1941:173, Figs. 10-12 [Revue de Zoologie et de Botanique Africaines v. 35 (no. 2); ref. 19488] Nyonga, Lake Upemba, Democratic Republic of Congo. Holotype: MRAC 20671. Paratypes: IRSNB 68 (1); MRAC 49319 (1), 66561-63 (1, 1, 1). Type catalog: Walschaerts 1987:7 [ref. 20755], Derijst 1991:64 [ref. 21528]. See also Poll 1941:158, table [ref. 19487]. •Synonym of Polypterus bichir Lacepède 1803, but a valid subspecies as described, and with Geoffroy St. Hilaire 1802 as author of bichir -- (Gosse 1984:20 [ref. 6169]). •Synonym of Polypterus bichir Lacepède 1803 -- (Moritz & Britz 2019:[19] [ref. 36886]). Current status: Synonym of Polypterus bichir Lacepède 1803. Polypteridae. Habitat: freshwater.

lapradei, Polypterus Steindachner [F.] 1869:112 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 6 (no. 15) (for 10 June 1869); ref. 20468] Senegal, western Africa. Syntypes: (3) NMW 63053 (1). Originally described as above, sometimes spelled lapradii in literature. Species later illustrated and described in more detail in Steindachner 1870:103 [p. 1 of separate], Pls. 1-2, [ref. 14100]. •Synonym of Polypterus bichir Lacepède 1803 [but with authorship as Geoffroy St. Hilaire 1802], but a valid subspecies -- (Gosse 1984:20 [ref. 6169], Lévêque et al. 1989:113 [ref. 26480], Gosse in Lévêque et al. 1990:82 [ref. 21589]). •Synonym of Polypterus bichir Lacepède 1803 -- (Moritz & Britz 2019:[19] [ref. 36886]). Current status: Synonym of Polypterus bichir Lacepède 1803. Polypteridae. Habitat: freshwater.

lowei, Polypterus Boulenger [G. A.] 1911:377 [Annals and Magazine of Natural History (Series 8) v. 7 (no. 40); ref. 14780] Nanna Kru, Liberia. Syntypes: BMNH 1911.5.31.1-4 (4). •Synonym of Polypterus retropinnis Vaillant 1899, but a valid subspecies -- (Gosse 1984:26 [ref. 6169]). •Synonym of Polypterus palmas Ayres 1850 -- (Gosse 1988:243 [ref. 6868], Paugy et al. 1990:332 [ref. 26477], Gosse in Lévêque et al. 1990:85 [ref. 21589], Hanssens et al. 1995:699 [ref. 22406]). Current status: Synonym of Polypterus palmas Ayres 1850. Polypteridae. Habitat: freshwater.

meridionalis, Polypterus senegalus Poll [M.] 1941:151 [Revue de Zoologie et de Botanique Africaines v. 35 (no. 2); ref. 19488] Democratic Republic of Congo. Syntypes: (132). Type catalog: Derijst 1991:64 [ref. 21528]. See also Poll 1941:158, table [ref. 19487] and Poll 1942:279, figs. 16-18 [ref. 19488]. •Synonym of Polypterus senegalus Cuvier 1829, but a valid subspecies as described -- (Gosse 1984:28 [ref. 6169], Gosse in Lévêque et al. 1990:85 [ref. 21589]). •Synonym of Polypterus senegalus Cuvier 1829 -- (Moritz & Britz 2019:[73] [ref. 36886]). Current status: Synonym of Polypterus senegalus Cuvier 1829. Polypteridae. Habitat: freshwater.

mokelembembe, Polypterus Schliewen [U. K.] & Schäfer [F.] 2006:24, Figs. 1a-3a, 6a [Zootaxa No. 1129; ref. 28498] Wamba, riv. Maringa, 0°11'N, 22°28'E, Democratic Republic of Congo. Holotype: MRAC 87921. Paratypes: BMNH 1907.12.3.4 (1); MNHN 1866-0297 (1); MRAC 72434-72435 (2), 79224-79225 (2), 101372 (1). Plus non-type material. Type catalog: Moritz & Britz 2019:[44] [ref. 36886]. •Valid as Polypterus mokelembembe Schliewen & Schäfer 2006 -- (Moritz & Britz 2019:[44] [ref. 36886]). Current status: Valid as Polypterus mokelembembe Schliewen & Schäfer 2006. Polypteridae. Distribution: Africa: Congo River basin. Habitat: freshwater.

niloticus, Polypterus Shaw [G.] 1804:122, Pl. 112 [General zoology or systematic natural history; ref. 4015] Nile River. No types known. Based on literature sources; unneeded new name for Polypterus bichir Geoffroy St. Hilaire 1802 [= Lacepède 1803]. •Synonym of Polypterus bichir Lacepède 1803 -- (Moritz & Britz 2019:[19] [ref. 36886]). Current status: Synonym of Polypterus bichir Lacepède 1803. Polypteridae. Habitat: freshwater.

ornatipinnis, Polypterus Boulenger [G. A.] 1902:23, Pl. 7 (fig. 1) [Annales du Musee du Congo (Ser. Zoologie) v. 2 (fasc. 2); ref. 562] Monsembé, Upper Congo River. Holotype (unique): BMNH 1901.12.21.1. Type catalog: Moritz & Britz 2019:[48] [ref. 36886]. •Valid as Polypterus ornatipinnis Boulenger 1902 -- (Gosse 1984:23 [ref. 6169], Poll & Gosse 1995:28 [ref. 24781], Seegers 1996:63 [ref. 23725], De Vos et al. 2001:129, 131 [ref. 26059], Britz 2004:185 [ref. 27800], Schliewen & Schäfer 2006:32 [ref. 28498], Skelton 2019:230 [ref. 36564], Moritz & Britz 2019:[48] [ref. 36886], Munene et al. 2021:20 [ref. 39283]). Current status: Valid as Polypterus ornatipinnis Boulenger 1902. Polypteridae. Distribution: Africa: Congo River system; tributaries to Lake Tanganyika and Lake Edward. Habitat: freshwater.

palmas, Polypterus Ayres [W. O.] 1850:241, Pl. 6 [Boston Journal of Natural History v. 6 (no. 2) (art. 2); ref. 15932] Cape Palmas, Liberia. Holotype (unique): MCZ [ex BSNH 702] presumed lost. Also appeared in Ayres 1850 (Mar.):181-182 [ref. 20576], p. 241 above dates to Jan. 1850 based on signature dates. A note about the type specimen being received by BSNH appeared on p. 283 in Proc. Bost. Soc. Nat. Hist. v. 3 (1848-1851). •Valid as Polypterus palmas Ayres 1850 -- (Gosse 1984:24 [ref. 6169], Gosse 1988:242 [ref. 6868], Lévêque et al. 1989:113 [ref. 26480], Paugy et al. 1990:332 [ref. 26477], Gosse in Lévêque et al. 1990:85 [ref. 21589], Poll & Gosse 1995:28 [ref. 24781], Hanssens et al. 1995:694 [ref. 22406] with subspecies, Britz 2004:185 [ref. 27800] with subspecies, Schliewen & Schäfer 2006:32 [ref. 28498], Pezold et al. 2016:101 [ref. 34870], Moritz & Britz 2019:[54] [ref. 36886]). Current status: Valid as Polypterus palmas Ayres 1850. Polypteridae. Distribution: West Africa: Upper Guinea region, Senegal to Ivory coast. Habitat: freshwater.

polli, Polypterus Gosse [J.-P.] 1988:241, Fig. 1 [Cybium v. 12 (no. 3); ref. 6868] Eala, Ruki River, Democratic Republic of Congo. Holotype: MRAC 47667. Paratypes: IRSNB 798 [ex 3268] (1); MRAC 1371-72 (2), 2799 (1), 3209 (1), 3211-13 (3), 3216-19 (4), 14676 (1), 14684 (1), 14694 (1), 30037 (1), 41649 (1), 56291 (1); plus non-type material. Type catalog: Moritz & Britz 2019:[64] [ref. 36886]. Replacement name for Polypterus palmas congicus Poll 1954 (nomen nudum) as validated by Daget 1962, preoccupied by Polypterus congicus Boulenger 1898. •Synonym of Polypterus palmas Ayres 1850, but a valid subspecies polli Gosse 1988 -- (Hanssens et al. 1995:704 [ref. 22406], Britz 2004:184 [ref. 27800], Schliewen & Schäfer 2006:32 [ref. 28498]). •Valid as Polypterus polli Gosse 1988 -- (Gosse 1988:243 [ref. 6868], Poll & Gosse 1995:28 [ref. 24781], Moritz & Britz 2019:[64] [ref. 36886]). Replacement Name. Current status: Valid as Polypterus polli Gosse 1988. Polypteridae. Distribution: Africa: Congo River system. Habitat: freshwater.

retropinnis, Polypterus Vaillant [L. L.] in Rivière 1886:17 [La Revue scientifique: revue hebdomadaire illustrée (Revue rose), éd. par Jean Duhem. v. 38 [series 3: v. 23 (no. 1)]; ref. 17852] Alima River, Upper Congo. Lectotype: MNHN 1886-0295. Paralectotypes: BMNH 1907.12.3.4 [ex MNHN] (1), MNHN 1886-0297 (1). Type catalog: Bertin 1940:247 [ref. 293] with a holotype, Moritz & Britz 2019:[68] [ref. 36886]. Described with much more detail by Vaillant 1899:219 [ref. 14711], or on p. 1 of separate. Lectotype designated by Schliewen & Schäfer 2006:31 [ref. 28498]. •Valid as Polypterus retropinnis Vaillant 1886 -- (Gosse 1984:25 [ref. 6169], Gosse 1988:243 [ref. 6868], Poll & Gosse 1995:28 [ref. 24781], Britz 2004:183 [ref. 27800], Britz 2007:171 [ref. 30014], Moritz & Britz 2019:[68] [ref. 36886], Stiassny et al. 2021:1686 [ref. 39000], Fermon et al. 2022:110 [ref. 39448]). Current status: Valid as Polypterus retropinnis Vaillant 1886. Polypteridae. Distribution: Western-central Africa: Ogowe and Congo River basins. Habitat: freshwater.

robbianus, Erpetoichthys Smith [J. A.] in Anonymous 1865:2 [Daily Review, Edinburgh No. 1486; ref. 20730] Syntypes: NMSZ 1867.018.001 (1 of 2 remaining), 1885.052 (some or all of 15), 1979.006.002 (1, dissected, dry). Type catalog: Herman et al. 1990:4 [ref. 20727]. Original as Robbianus. •Synonym of Erpetoichthys calabaricus Smith 1865 -- (Swinney & Heppell 1982:96 [ref. 20746], Moritz & Britz 2019:[6] [ref. 36886]). Current status: Synonym of Erpetoichthys calabaricus Smith 1865. Polypteridae. Habitat: freshwater.

schoutedeni, Polypterus Pellegrin [J.] 1923:296 [Revue de Zoologie Africaine v. 11 (no. 3); ref. 15424] Congo River at Mongende, Democratic Republic of Congo. Holotype: MNHN 1923-0102. Paratypes: (2). Type catalog: Bertin 1940:247 [ref. 293]. •Synonym of Polypterus weeksii Boulenger 1898 -- (Gosse 1984:29 [ref. 6169], Moritz & Britz 2019:[86] [ref. 36886]). Current status: Synonym of Polypterus weeksii Boulenger 1898. Polypteridae. Habitat: freshwater.

senegalus, Polypterus Cuvier [G.] 1829:330 [Le Règne Animal (Edition 2) v. 2; ref. 995] Senegal. Holotype (unique): MNHN 0000-5765. Type catalog: Bertin 1940:247 [ref. 293], Moritz & Britz 2019:[73] [ref. 36886], •Valid as Polypterus senegalus Cuvier 1829, subspecies senegalus -- (Seegers et al. 2003:28 [ref. 28087]). •Valid as Polypterus senegalus Cuvier 1829 -- (Gosse 1984:26 [ref. 6169], Lévêque et al. 1989:113 [ref. 26480], Paugy & Bénech 1989:299 [ref. 26478] as senagalus, Gosse in Lévêque et al. 1990:84 [ref. 21589], Poll & Gosse 1995:28 [ref. 24781], Dankwa et al. 1999:11 [ref. 28023], Britz 2004:184 [ref. 27800], Neumann et al. 2016:303 [ref. 35036], Moritz & Britz 2019:[73] [ref. 36886], Akoth et al. 2023:7 [ref. 40069]). Current status: Valid as Polypterus senegalus Cuvier 1829. Polypteridae. Distribution: Africa: widespread from Senegal and Gambia rivers, Niger and Chad basins to Nile River basin; Lake Albert, Lake Turkana; single record from Congo basin Habitat: freshwater.

teugelsi, Polypterus Britz [R.] 2004:180, Fig. 1 [Ichthyological Exploration of Freshwaters v. 15 (no. 2); ref. 27800] Cross River system downstream of Mamfe at Bapuo River junction with Cross, 5°55'30"N, 9°09'00"E, Manyu, Cameroon. Holotype: USNM 303913. Paratypes: MRAC P 73029.0342 (1), 73040.0005-73040-0007 (3); USNM 303773 (3), 303799 (1), 303820 (3), 375961 (5). Type catalog: Moritz & Britz 2019:[82] [ref. 36886]. •Valid as Polypterus teugelsi Britz 2004 -- (Schliewen & Schäfer 2006:32 [ref. 28498], Britz 2007:171 [ref. 30014], Moritz & Britz 2019:[82] [ref. 36886]). Current status: Valid as Polypterus teugelsi Britz 2004. Polypteridae. Distribution: West Africa: Cameroon. Habitat: freshwater.

weeksii, Polypterus Boulenger [G. A.] 1898:419 [Annals and Magazine of Natural History (Series 7) v. 2 (no. 11) (art. 50); ref. 14681] Monsembé, upper Congo River, Democratic Republic of Congo. Holotype (unique): BMNH 1898.7.9.37. Type catalog: Moritz & Britz 2019:[86] [ref. 36886]. •Valid as Polypterus weeksii Boulenger 1898 -- (Gosse 1984:29 [ref. 6169], Poll & Gosse 1995:28 [ref. 24781], Britz 2004:184 [ref. 27800], Moritz & Britz 2019:[86] [ref. 36886], Stiassny et al. 2021:1686 [ref. 39000]). Current status: Valid as Polypterus weeksii Boulenger 1898. Polypteridae. Distribution: Western-central Africa: Congo River basin. Habitat: freshwater.