Tetragonopterus Cuvier [G.] 1816:166 Masc. Tetragonopterus argenteus Cuvier 1816. Type by monotypy. Appeared first without latinization in Cuvier 1815:114 [ref. 5017]. •Valid as Tetragonopterus Cuvier 1816 -- (Géry 1977:450 [ref. 1597], Taphorn 1992:343 [ref. 23654], Britski et al. 1999:30 [ref. 24147], Reis in Reis et al. 2003:212 [ref. 27061], Benine et al. 2004:339 [ref. 27973], Mirande 2009:7 [ref. 30267] in Characidae, Tetragonopterinae, Mirande 2010:500 [ref. 31006], Melo et al. 2011:49 [ref. 31233], Silva & Benine 2011:50 [ref. 31347], Oliveira et al. 2011:15 [ref. 31685], Silva et al. 2013:1613 [ref. 32576], Araujo & Lucinda 2014:309 [ref. 33377], Carvalho & Santos 2015:146 [ref. 33957], Melo et al. 2015:709 [ref. 35424], Silva et al. 2016:10 [ref. 34929], Urbanski et al. 2018:[1] [ref. 35973], Terán et al. 2020:5 [ref. 37440], Melo et al. 2024:15 [ref. 41541] in Tetragonopterinae). Current status: Valid as Tetragonopterus Cuvier 1816. Characidae: Tetragonopterinae.