macrocephalus, Semotilus Girard [C. F.] 1856:204 [40] [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1810] Missouri River at Fort Pierre, Stanley County, South Dakota, U.S.A. Syntypes: UMMZ 56284 [ex USNM 177, old UMMZ 4038] (1), USNM 177 (orig. 10, now 1, plus 2 pharyngeal arches as # 2741). Type catalog: Gilbert 1998:108 [ref. 23395] with locality information. On p. 40 of separate. •Synonym of Semotilus atromaculatus (Mitchill 1818) -- (Gilbert 1998:108 [ref. 23395]). Current status: Synonym of Semotilus atromaculatus (Mitchill 1818). Leuciscidae: Plagopterinae. Habitat: freshwater.