marcgravii, Sternopygus Reinhardt [J. T.] 1852:146 [Videnskabelige Meddelelser fra den Naturhistoriske Forening i Kjøbenhavn, Aaret 1852; ref. 18619] Rio das Velhas, Rio São Francisco, Brazil. Syntypes: BMNH 1868.7.8.1 (1); ZMUC P2512 (1) [formerly ZMUC 7], P2515 (1) [formerly ZMUC 16]. Type catalog: Nielsen 1974:48 [ref. 9588] as marcgravi, Ferraris et al. 2017:[35] [ref. 35236]. •Synonym of Sternopygus macrurus (Bloch & Schneider 1801) -- (Mago-Leccia 1994:23 [ref. 21320], Albert & Fink 1996:89 [ref. 22024], Albert in Reis et al. 2003:489 [ref. 27061], Crampton et al. 2004:248 [ref. 27652], Hulen et al. 2005:412 [ref. 28485], Mirande & Koerber 2015:47 [ref. 35117], Ferraris et al. 2017:[35] [ref. 35236], Koerber et al. 2017:68 [ref. 35267]). Current status: Synonym of Sternopygus macrurus (Bloch & Schneider 1801). Sternopygidae: Sternopyginae. Habitat: freshwater.