Species that contain: Hybognathus and nuchalis [ 3 ] records

amnigenus, Tirodon Hay [O. P.] 1882:68 [Bulletin of the U. S. Fish Commission v. 2 (for 1882); ref. 2054] Pearl River at Jackson, Hinds County, Mississippi, U.S.A. Holotype (unique): USNM 32157. Type catalog: Gilbert 1998:40 [ref. 23395]. •Synonym of Hybognathus nuchalis Agassiz 1855 -- (Gilbert 1998:40 [ref. 23395], Scott & Crossman 1998:420 [ref. 24570], Ross et al. 2001:160 [ref. 25978]). Current status: Synonym of Hybognathus nuchalis Agassiz 1855. Leuciscidae: Pogonichthyinae. Habitat: freshwater.

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.

regius, Hybognathus Girard [C. F.] 1856:209 [45] [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1810] Potomac River and probably all fresh waters of Maryland, U.S.A. Syntypes: UMMZ 56285 [ex USNM 11] (1); USNM 10 (orig. 4, now 0, 1 pair pharyngeal arches as #2631), 11 (orig. 8, now 0, 1 pair pharyngeal arches as #2632). Type catalog: Gilbert 1998:140 [ref. 23395]. On p. 45 of separate. •Status uncertain -- (Lee et al. 1980:177, 179 [ref. 22416]). •Synonym of Hybognathus nuchalis Agassiz 1855, but a valid subspecies -- (Scott & Crossman 1998:417 [ref. 24570]). •Valid as Hybognathus regius Girard 1856 -- (Smith 1986:163 [ref. 22186], McAllister 1990:59 [ref. 14674], Page & Burr 1991:108 [ref. 18983], Jenkins & Burkhead 1994:446 [ref. 21581], Schmidt 1994:622 [ref. 22424], Stauffer et al. 1995:88 [ref. 23376], Bestgen & Propst 1996:51 [ref. 22399], Murdy et al. 1997:87 [ref. 23144], Gilbert 1998:140 [ref. 23395], Mandrak & Ramshaw 1998:141 [ref. 24999], Houston 1998:147 [ref. 25000], Fuller et al. 1999:79 [ref. 25838], Nelson et al. 2004:71 [ref. 27807], Scharpf 2005:20 [ref. 28940], Page & Burr 2011:218 [ref. 31215], Page et al. 2013:71 [ref. 32708], Page et al. 2023:71 [ref. 40505]). Current status: Valid as Hybognathus regius Girard 1856. Leuciscidae: Pogonichthyinae. Distribution: Eastern North America: Atlantic slope (U.S.A. and Canada). Habitat: freshwater.