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.