Carapus Cuvier [G.] 1816:237 Masc. Gymnotus macrurus Bloch & Schneider 1801. Earliest type designation not researched; Gymnotus macrourus Bloch 1786 is not an available name. Type species now valid as Sternopygus macrurus (Bloch & Schneider 1801). Objectively invalid; preoccupied by Carapus Rafinesque 1810 in fishes; replaced by Giton Kaup 1856. •Synonym of Sternopygus Müller & Troschel 1846 -- (Mago-Leccia 1994:53 [ref. 21320], Campos-da-Paz in Reis et al. 2003:484 [ref. 27061], Ferraris et al. 2017:[16] [ref. 35236]). 1°Homonym. Current status: Synonym of Sternopygus Müller & Troschel 1846. Sternopygidae: Sternopyginae.