nigricans, Catostomus Lesueur [C. A.] 1817:102 [Journal of the Academy of Natural Sciences, Philadelphia v. 1 (pt 1, nos 5/6); ref. 2734] Lake Erie, North America. Holotype (unique): whereabouts unknown. Type catalog: Gilbert 1998:194 [ref. 23395]. •Valid as Hypentelium nigricans (Lesueur 1817) -- (Lee et al. 1980:402 [ref. 22416], Smith 1986:102 [ref. 22186], Robison & Buchanan 1988:270 [ref. 23393], McAllister 1990:55 [ref. 14674], Tomelleri & Eberle 1990:112 [ref. 24089], Page & Burr 1991:180 [ref. 18983], Boschung 1992:61 [ref. 23239], Etnier & Starnes 1993:275 [ref. 22809], Jenkins & Burkhead 1994:478 [ref. 21581], Warren et al. 1994:132 [ref. 25557], Knight & Hastings 1994:149 [ref. 25560], Stauffer et al. 1995:186 [ref. 23376], Cross & Collins 1995:124 [ref. 23394], Mettee et al. 1996:345 [ref. 25836], Gilbert 1998:194 [ref. 23395], Scott & Crossman 1998:554 [ref. 24570], Fuller et al. 1999:168 [ref. 25838], Lyons et al. 2000:33 [ref. 26594], Ross et al. 2001:272 [ref. 25978], Nelson et al. 2004:79 [ref. 27807], Bailey et al. 2004:117 [ref. 27882], Miller & Robison 2004:204 [ref. 27931], Boschung & Mayden 2004:304 [ref. 27995], Scharpf 2006:10 [ref. 30386], Page & Burr 2011:323 [ref. 31215], Page et al. 2013:80 [ref. 32708], Bagley et al. 2023:315 [ref. 41241], Page et al. 2023:64 [ref. 40505], Fricke et al. 2024:158 [ref. 41622]). Current status: Valid as Hypentelium nigricans (Lesueur 1817). Catostomidae: Catostominae. Distribution: North America: Atlantic and Gulf drainages (U.S.A.). Introduced in Baja California Sur and Tamaulipas (Mexico). Habitat: freshwater.