communis, Pogonichthys Girard [C. F.] 1856:188 [24] [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1810] Fort Pierre; Fort Union and above Fort Union; Milk River; Yellowstone River; Sweetwater River, a tributary of Platt River, U.S.A. Syntypes: MCZ 35938 (2); UMMZ 56283 (1); USNM 181 [= 20107] (34 spec., 5 pharyngeal arches), 184 (2 arches), 185 (now 0), 186 [= 20300] (orig. 6, now 4), 187 (2 arches), 188 (2 arches), 189 (1 spec, 2 arches). Type catalog: Gilbert 1998:62-63 [ref. 23395]. On p. 24 of separate. •Synonym of Platygobio gracilis (Richardson 1836) -- (Gilbert 1998:62-63 [ref. 23395], Scott & Crossman 1998:487 [ref. 24570]). Current status: Synonym of Platygobio gracilis (Richardson 1836). Leuciscidae: Pogonichthyinae. Habitat: freshwater.