occidentale, Characidium Buckup [P. A.] & Reis [R. E.] 1997:532, Fig. 1A [Copeia 1997 (no. 3); ref. 22903] Arroio Canoin, about 28°07'S, 55°13'W, on road between Pirapó and São Nicolau, Rio Grande do Sul, Brazil. Holotype: MCP 17585. Paratypes: MCN 5653 (6), 6796 (1), 6801 (1); MCP 11907 (1), 12534 (8, 1 c&s); MNRJ 13345 (5), 13365 (3). •Valid as Characidium occidentale Buckup & Reis 1997 -- (Buckup & Hahn 2000:151 [ref. 24257] once as yoccidentale, Zarske & Géry 2001:243 [ref. 25972], Melo & Buckup 2002:992 [ref. 26508], Buckup in Reis et al. 2003:90 [ref. 27061], López et al. 2003:16 [ref. 27366], 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], Mirande & Koerber 2015:27 [ref. 35117], Bertaco et al. 2016:414 [ref. 34561], Nión et al. 2016:27 [ref. 35565], Teixeira & Melo 2020:9 [ref. 37999], Loureiro et al. 2023:32 [ref. 40506]). Current status: Valid as Characidium occidentale Buckup & Reis 1997. Crenuchidae: Characidiinae. Distribution: South America: Uruguay River basin (Argentina, Uruguay and Brazil). Habitat: freshwater.