Orthosternarchus Ellis [M. M.] in Eigenmann 1912:424 Masc. Sternarchus tamandua Boulenger 1898. Type by original designation (also monotypic). Name appeared in Ellis in Eigenmann 1912:424 in key, then in Ellis 1913:144 with a species [ref. 35236]. •Valid as Orthosternarchus Ellis in Eigenmann 1912 -- (see Mago-Leccia 1978:14 [ref. 5489], Mago-Leccia 1994:31 [ref. 21320], Albert & Campos-da-Paz 1998:429 [ref. 23853], Albert 2001:56 [ref. 25614], Albert in Reis et al. 2003:499 [ref. 27061], Triques 2005:144 [ref. 28939], Hilton et al. 2007:3 [ref. 29267], Albert & Crampton 2009:90 [ref. 30049] dated 1912, Tagliacollo et al. 2016:30 [ref. 34087] in Sternarchorhamphinae, Ferraris et al. 2017:[9] [ref. 35236], Bernt et al. 2018:467 [ref. 35797]). Current status: Valid as Orthosternarchus Ellis 1912. Apteronotidae: Sternarchorhamphinae.