orientale, Characidium Buckup [P. A.] & Reis [R. E.] 1997:535, Fig. 1B [Copeia 1997 (no. 3); ref. 22903] Arroio Chasqueiro on road (BR116) between Pelotas and Arroio Grande, Rio Grande do sul, Brazil, about 32°09'S, 53°03'W. Holotype: MCP 16847. Paratypes: MCN 8149 (3); MCP 9529 (1), 11408 (6), 14620 (2), 14659 (4), 17399-400 (7, 10), 17401-02 (5, 13), 17587 (6); MNRJ 13495 (2), 13497 (5); UFRGS 3810-12 (5, 10, 10). •Valid as Characidium orientale Buckup & Reis 1997 -- (Buckup & Hahn 2000:151 [ref. 24257], Zarske & Géry 2001:245 [ref. 25972], Melo & Buckup 2002:992 [ref. 26508], Buckup in Reis et al. 2003:90 [ref. 27061], Netto-Ferreira et al. 2013:366 [ref. 32717], Litz & Koerber 2014:16 [ref. 33622], Mendonça & Netto-Ferreira 2015:192 [ref. 33967], Zanata & Ohara 2015:373 [ref. 33970], 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 orientale Buckup & Reis 1997. Crenuchidae: Characidiinae. Distribution: South America: coastal basins of southern Brazil and Uruguay. Habitat: freshwater.