vestigipinne, Characidium Buckup [P. A.] & Hahn [L.] 2000:151, Fig. 1 [Copeia 2000 (no. 1); ref. 24257] Headwaters of rio Caraguatá, about 28°09'S, 52°18'W, about 200 meters from RS-135 highway, at Fazenda Dückel, Coxilla, Rio Grande do Sul, Brazil. Holotype: MCP 20317. Paratypes: MCP 19558 (5), 19870 (8); MNRJ 16573 (8, 2 c&s). •Valid as Characidium vestigipinne Buckup & Hahn 2000 -- (Zarske & Géry 2001:245 [ref. 25972], Melo & Buckup 2002:992 [ref. 26508], Buckup in Reis et al. 2003:91 [ref. 27061], Netto-Ferreira et al. 2013:366 [ref. 32717], Casciotta et al. 2015:1 [ref. 33697], Mendonça & Netto-Ferreira 2015:192 [ref. 33967], Zanata & Ohara 2015:373 [ref. 33970], Bertaco et al. 2016:414 [ref. 34561], Teixeira & Melo 2020:10 [ref. 37999]). Current status: Valid as Characidium vestigipinne Buckup & Hahn 2000. Crenuchidae: Characidiinae. Distribution: Upper Uruguay River basin, Rio Grande do Sul, Brazil. Habitat: freshwater.