nuchalis, Hybognathus Agassiz [L.] 1855:224 [39] [American Journal of Science and Arts (Series 2) v. 19 (no. 56); ref. 5839] Mississippi River at Quincy, Adams County, Illinois, U.S.A. Lectotype: MCZ 1926. Paralectotypes: BMNH 1867.4.12.9 (1); MCZ 27435 (2), 40697 (orig. 20, now 10), 153936 (pharyngeal arches); UMMZ 87115 [ex MCZ 1926] (4); USNM 120272 [ex MCZ 1926] (4). Type catalog: Gilbert 1998:123 [ref. 23395]. On p. 39 of separate. Lectotype selected by Fingerman & Suttkus 1961:462 [ref. 22242]. •Valid as Hybognathus nuchalis Agassiz 1855 -- (Fingerman & Suttkus 1961:462 [ref. 22242], Lee et al. 1980:177 [ref. 22416], Robison & Buchanan 1988:179 [ref. 23393], Page & Burr 1991:107 [ref. 18983], Boschung 1992:49 [ref. 23239], Cook et al. 1992:36 [ref. 19894], Etnier & Starnes 1993:172 [ref. 22809], Schmidt 1994:622 [ref. 22424], Warren et al. 1994:132 [ref. 25557], Bestgen & Propst 1996:51 [ref. 22399], Mettee et al. 1996:191 [ref. 25836], Gilbert 1998:123 [ref. 23395], Scott & Crossman 1998:417 [ref. 24570], Houston 1998:147 [ref. 25000], Lyons et al. 2000:23 [ref. 26594], Ross et al. 2001:159 [ref. 25978], Nelson et al. 2004:71 [ref. 27807], Miller & Robison 2004:108 [ref. 27931], Boschung & Mayden 2004:184 [ref. 27995], Scharpf 2005:20 [ref. 28940], Page & Burr 2011:217 [ref. 31215], Page et al. 2013:71 [ref. 32708], Bagley et al. 2023:314 [ref. 41241]). Current status: Valid as Hybognathus nuchalis Agassiz 1855. Leuciscidae: Pogonichthyinae. Distribution: North America: central and southern U.S.A. Habitat: freshwater.