lepturus, Hypopygus Hoedeman [J. J.] 1962:99, Fig. 4 [Bulletin of Aquatic Biology v. 3 (no. 30); ref. 12585] Maroni basin, Suriname. Holotype: RMNH 19466. Paratypes: RMNH 24408 [ex RMNH 19466] (1). Type catalog: Ferraris et al. 2017:[27] [ref. 35236]. Type locality by restriction (see de Santana & Crampton 2011:1128 [ref. 31643]) is not provided for in the Code. •Valid as Hypopygus lepturus Hoedeman 1962 -- (Ortega & Vari 1986:13 [ref. 9708], Mago-Leccia 1994:50 [ref. 21320], Planquette et al. 1996:394 [ref. 22818], Albert & Campos-da-Paz 1998:423 [ref. 23853], Lasso et al. 2001:100 [ref. 25928], Albert & Crampton in Reis et al. 2003:495 [ref. 27061], de Santana & Crampton 2011:1128 [ref. 31643], Barriga Salazar 2014:116 [ref. 35745], Peixoto et al. 2013:232 [ref. 32780], Sarmiento et al. 2014:188 [ref. 35004], Ferraris et al. 2017:[27] [ref. 35236], DoNascimiento et al. 2017:66 [ref. 35633], Urbano-Bonilla et al. 2018:73 [ref. 35773], Campos-da-Paz 2018:198 [ref. 35891], Ochoa et al. 2020:64 [ref. 37781], Meza-Vargas et al. 2021:21 [ref. 39298], Borstein et al. 2022:16 [ref. 39507], Torgersen et al. 2023:780 [ref. 40692]). Current status: Valid as Hypopygus lepturus Hoedeman 1962. Rhamphichthyidae. Distribution: South America: Amazon and Orinoco River basins, tributaries of the Paraguay River, and coastal rivers of the Guianas (Bolivia, Brazil, Ecuador, Colombia, French Guiana, Guyana, Peru, Suriname and Venezuela). Habitat: freshwater.