macrostoma, Sternarchus Günther [A.] 1870:4 [Catalogue of the fishes in the British Museum v. 8; ref. 1995] Xeberos [Jeberos], Río Marañon drainage, Amazon River system, Peru. Holotype (unique): BMNH 1867.6.13.76. Type catalog: Ferraris et al. 2017:[10] [ref. 35236]. Specific name is an indeclinable noun. •Valid as Sternarchorhamphus macrostoma (Günther 1870) -- (Ortega & Vari 1986:12 [ref. 9708] as macrostomus). •Valid as Platyurosternarchus macrostoma (Günther 1870) (often seen as macrostomus) -- (Mago-Leccia 1994:38 [ref. 21320], Campos-da-Paz 1995:40 [ref. 22512], Chang & Ortega 1995:6 [ref. 24302], Albert & Campos-da-Paz 1998:430 [ref. 23853], Albert 2001:111 [ref. 25614], Albert in Reis et al. 2003:500 [ref. 27061], de Santana & Vari 2009:240 [ref. 30206], Barriga Salazar 2014:116 [ref. 35745], Sarmiento et al. 2014:188 [ref. 35004] as macrostomus, DoNascimiento 2016:535 [ref. 34727], DoNascimiento et al. 2017:68 [ref. 35633] as macrostomus, Ferraris et al. 2017:[10] [ref. 35236], Bernt et al. 2018:474 [ref. 35797] as macrostomus, Urbano-Bonilla et al. 2018:72 [ref. 35773], Ochoa et al. 2020:63 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Taphorn et al. in Lasso & Morales-Betancourt 2022:72 [ref. 40783], Torgersen et al. 2023:775 [ref. 40692]). Current status: Valid as Platyurosternarchus macrostoma (Günther 1870). Apteronotidae: Apteronotinae. Distribution: South America: Amazon, Orinoco and Essequibo basins (Brazil, Bolivia, Colombia, Ecuador, Guyana, Peru and Venezuela). Habitat: freshwater.