cuyanus, Diplomystes viedmensis Ringuelet [R. A.] 1965:91 [Physis (Buenos Aires) v. 25 (no. 69); ref. 9247] Arroyo Taucha [Yaucha], Vilucó, Province of Mendoza, Argentina. Holotype: MLP 286. Paratypes: MLP 948 (1). Type catalog: Ferraris 2007:166 [ref. 29155], Miquelarena & Nadalin 2014:10 [ref. 33466]. •Valid as Olivaichthys cuyanus (Ringuelet 1965) -- (de Pinna 1998:291 [ref. 23847], Ferraris in Reis et al. 2003:256 [ref. 27061], Ferraris 2007:166 [ref. 29155]). •Valid as Diplomystes cuyanus Ringuelet 1965 -- (Azpelicueta 1994:228 [ref. 22312], Azpelicueta 1994:13 [ref. 22377], Burgess & Finley 1996:163 [ref. 22901], Azpelicueta & Gosztonyi 1998:902 [ref. 25377], López et al. 2002:60 [ref. 26808], López et al. 2003:37 [ref. 27366], Lundberg et al. 2004:72 [ref. 27673], Menni 2004:79 [ref. 28131], Muñoz-Ramírez et al. 2014:148 [ref. 33192] with remarks, Mirande & Koerber 2015:27 [ref. 35117], Muñoz-Ramírez et al. 2023:8 [ref. 40526]). Current status: Valid as Diplomystes cuyanus Ringuelet 1965. Diplomystidae. Distribution: South America: several river basins in southern Argentina (Pacific drainage). Habitat: freshwater.