melanops, Dionda Girard [C. F.] 1856:178 [14] [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1810] Buena Vista [La Joya del Refugio], Coahuila, Mexico. Syntypes: ANSP 5070 [ex USNM 38] (1), MCZ 1809 [ex USNM 38 and 1980] (1), MNHN 0000-0360 [ex USNM 38] (1), USNM 38 (orig. 5, now 0, 2 pharyngeal arches as #2652). Type catalog: Böhlke 1984:83 [ref. 13621], Gilbert 1998:112 [ref. 23395]. On p. 14 of separate. Mayden et al. 1992 [ref. 29832] as first revisors selected Dionda melanops as the appropriate name for this taxon; D. couchi is a junior subjective synonym. •Valid species or valid subspecies of Dionda episcopa -- (Miller 1991:226 [ref. 20063]). •Valid as Dionda melanops Girard 1856 -- (Espinosa Pérez et al. 1993:13 [ref. 22290], Gilbert 1998:112 [ref. 23395], Nelson et al. 2004:70 [ref. 27807], Scharpf 2005:15 [ref. 28940], Schönhuth et al. 2008:738 [ref. 29831], Schönhuth et al. 2011:428 [ref. 36200], Page et al. 2013:70 [ref. 32708], Page et al. 2023:69 [ref. 40505]). Current status: Valid as Dionda melanops Girard 1856. Leuciscidae: Pogonichthyinae. Distribution: Southern North America: Atlantic slope of Mexico. Habitat: freshwater.