Species that contain: Cycleptus and elongatus [ 2 ] records

elongatus, Catostomus Lesueur [C. A.] 1817:103 [Journal of the Academy of Natural Sciences, Philadelphia v. 1 (pt 1, nos 5/6); ref. 2734] Ohio River, [presumeably western Pennsylvania], U.S.A. Holotype (unique): ANSP (dry, not found). Type catalog: Gilbert 1998:181 [ref. 23395]. •Valid as Cycleptus elongatus (Lesueur 1817) -- (Lee et al. 1980:396 [ref. 22416], Warren Jr. & Cicerello 1982:3 [ref. 40469], Robison & Buchanan 1988:266 [ref. 23393], Tomelleri & Eberle 1990:97 [ref. 24089], Page & Burr 1991:167 [ref. 18983], Boschung 1992:60 [ref. 23239], Espinosa Pérez et al. 1993:23 [ref. 22290], Etnier & Starnes 1993:268 [ref. 22809], Stauffer et al. 1995:181 [ref. 23376], Cross & Collins 1995:122 [ref. 23394], Mettee et al. 1996:336 [ref. 25836], Gilbert 1998:181 [ref. 23395], Burr & Mayden 1999:22 [ref. 24027], Lyons et al. 2000:33 [ref. 26594], Buth & Mayden 2001:899 [ref. 25814], Ross et al. 2001:263 [ref. 25978], Nelson et al. 2004:79 [ref. 27807], Miller & Robison 2004:198 [ref. 27931], Boschung & Mayden 2004:297 [ref. 27995], Miller 2006:149 [ref. 28615], Scharpf 2006:8 [ref. 30386], Page & Burr 2011:304 [ref. 31215], Page et al. 2013:79 [ref. 32708], Page et al. 2023:64 [ref. 40505]). Current status: Valid as Cycleptus elongatus (Lesueur 1817). Catostomidae: Cycleptinae. Distribution: North America: U.S.A. and northern Mexico. Habitat: freshwater.

nigrescens, Cycleptus Rafinesque [C. S.] 1819:421 [Journal de Physique, de Chimie et d'Histoire Naturelle v. 88; ref. 3590] Ohio and Missouri rivers, U.S.A. No types known. Type catalog: Gilbert 1998:193-194 [ref. 23395]. •Synonym of Cycleptus elongatus (Lesueur 1817) -- (Gilbert 1998:194 [ref. 23395], Burr & Mayden 1999:22 [ref. 24027]). Current status: Synonym of Cycleptus elongatus (Lesueur 1817). Catostomidae: Cycleptinae. Habitat: freshwater.