leptorhynchus, Sternarchus Ellis [M. D.] in Eigenmann 1912:439 [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Amatuk, Guyana. Holotype: FMNH 53294 [ex CM 1762, not 1763a]. Paratypes: CAS 62333 [ex IU 12588] (1), FMNH 53295 (1) [? ex CM 1764a]. Type catalog: Henn 1928:71 [ref. 12305], Ibarra & Stewart 1987:81 [ref. 12367], Ferraris et al. 2017:[7] [ref. 35236]. •Valid as Apteronotus leptorhynchus (Ellis 1912) -- (Ortega & Vari 1986:12 [ref. 9708], Mago-Leccia 1994:29 [ref. 21320], Galvis et al. 1997:104 [ref. 23651], Albert & Campos-da-Paz 1998:431 [ref. 23853], Albert 2001:110 [ref. 25614], de Santana 2003:8 [ref. 26978], Albert in Reis et al. 2003:498 [ref. 27061], de Santana & Crampton 2006:115 [ref. 28765], Triques 2007:85 [ref. 29060], de Santana et al. 2007:117 [ref. 29198], Triques 2011:300 [ref. 31671], de Santana & Cox Fernandes 2012:284 [ref. 32053], de Santana & Vari 2013:582 [ref. 32777], DoNascimiento 2016:534 [ref. 34727], Ferraris et al. 2017:[7] [ref. 35236], see DoNascimiento et al. 2017:[15] [ref. 35679], Taphorn et al. 2022:38 [ref. 41297]). Current status: Valid as Apteronotus leptorhynchus (Ellis 1912). Apteronotidae: Apteronotinae. Distribution: South America: Essequibo River drainage (Guyana) [some records above are in error]. Habitat: freshwater.