hypostomus, Gymnorhamphichthys Ellis [M. M.] in Eigenmann 1912:436 [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] San Joaquín, Bolivia. Holotype: FMNH 54554 [ex CM 3182]. Paratypes: ?FMNH [ex CM 3183a] (1). Additional original material: CAS 31183 [ex IU 12613] (2), CAS 31184-85 [ex IU 12641-42] (2, 1); FMNH 54555-57 (1, 2, 1). Type catalog: Henn 1928:70 [ref. 12305], Ibarra & Stewart 1987:42 [ref. 12367], Ferraris et al. 2017:[26] [ref. 35236]. Also appeared in Ellis 1913:139, Pl. 23 (fig. 2) [ref. 1271]. No longer known from Argentina -- Koerber 2012:10 [ref. 32229]. •Valid as Gymnorhamphichthys hypostomus Ellis 1912 -- (Schwassmann 1989:166 [ref. 13745], Mago-Leccia 1994:42 [ref. 21320], Chang & Ortega 1995:3 [ref. 24302], Albert & Campos-da-Paz 1998:423 [ref. 23853], Britski et al. 1999:87 [ref. 24147], Albert 2001:124 [ref. 25614], Ferraris in Reis et al. 2003:492 [ref. 27061], López et al. 2003:65 [ref. 27366], Menni 2004:84 [ref. 28131], Lundberg 2005:2 [ref. 20334], Carvalho et al. 2011:400 [ref. 31553], de Santana & Crampton 2011:1155 [ref. 31643], Barriga Salazar 2014:116 [ref. 35745], Sarmiento et al. 2014:107, 188 [ref. 35004], Ferraris et al. 2017:[26] [ref. 35236], DoNascimiento et al. 2017:66 [ref. 35633], Urbano-Bonilla et al. 2018:73 [ref. 35773], Ochoa et al. 2020:64 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Lasso et al. in Lasso & Morales-Betancourt 2022:94 [ref. 40783], Taphorn et al. 2022:40 [ref. 41297]). Current status: Valid as Gymnorhamphichthys hypostomus Ellis 1912. Rhamphichthyidae. Distribution: South America: Amazon and Orinoco river basins (Bolivia, Brazil, Colombia, Ecuador, Guyana and Peru). Habitat: freshwater.