affinis, Isopisthus Steindachner [F.] 1879:34 [Anzeiger der Kaiserlichen Akademie der Wissenschaften, Wien, Mathematisch-Naturwissenschaftliche Classe v. 16 (no. 4); ref. 20480] Porto Alegre, Brazil. Syntypes: NMW 15190 (2). Species later illustrated and described in more detail in Steindachner 1879:43, Pl. 2 (fig. 2) [ref. 4228]. •Synonym of Isopisthus parvipinnis (Cuvier 1830) -- (Chao 1978:37 [ref. 6983], Chao 2003:1619 [ref. 27097], Parenti 2020:18 [ref. 37439]). Current status: Synonym of Isopisthus parvipinnis (Cuvier 1830). Sciaenidae. Habitat: brackish, marine.