nahuelbutaensis, Diplomystes Arratia [G.] 1987:33, Figs. 8, 10-18 [Bonner Zoologische Monographien No. 24; ref. 5957] Río Cautín, Lautaro, Chile. Holotype: CAS 55423 [ex IU 55423]. Paratypes: BMNH 1876.10.2.22 (1, skeleton); CAS 30875 [ex IU 15524] (2), 55424 [ex IU 15522] (6), 55425 [ex IU 15522] (1, c&s), 55426 [ex IU 15523] (1); MCZ 61245 (2); ?UMMZ 212177 (1). Type catalog: Ferraris 2007:166 [ref. 29155]. Paratype CAS 55426 is D. incognitus [ref. 35155]. •Valid as Diplomystes nahuelbutaensis Arratia 1987 -- (Pequeño 1989:40 [ref. 14125], Ruiz & Berra 1994:14 [ref. 21384], Burgess & Finley 1996:163 [ref. 22901], Campos et al. 1997:113 [ref. 23248], de Pinna 1998:291 [ref. 23847], Azpelicueta & Gosztonyi 1998:902 [ref. 25377], Dyer 2000:84 [ref. 26678], Ferraris in Reis et al. 2003:255 [ref. 27061], Lundberg et al. 2004:71 [ref. 27673], Ferraris 2007:166 [ref. 29155], Muñoz-Ramírez et al. 2014:146 [ref. 33182] with remarks, Arratia & Quezada-Romegialli 2017:6 [ref. 35155], Muñoz-Ramírez et al. 2020:6 [ref. 37484], Muñoz-Ramírez et al. 2023:8 [ref. 40526]). Current status: Valid as Diplomystes nahuelbutaensis Arratia 1987. Diplomystidae. Distribution: South America: Imperial River basin, Chile. Habitat: freshwater.