Couesius Jordan [D. S.] 1878:784 Masc. Leucosomus dissimilis Girard 1856. Type by original designation. Type stated as Leucosomus dissimilis Girard = Nocomis milneri Jordan; dissimilis regarded as type -- the only species Jordan recognized as valid with the original description of the genus. •Valid as Couesius Jordan 1878 -- (Robins et al. 1980:21 [ref. 7111], Simons & Mayden 1997:187 [ref. 24948], Gilbert 1998:16 [ref. 23395], Simons & Mayden 1998:313 [ref. 25587], Mecklenburg et al. 2002:141 [ref. 25968]). Current status: Valid as Couesius Jordan 1878. Leuciscidae: Plagopterinae.