mariposita, Characidium Méttola [V. E.], Terán [G. E.], Serra [W. S.], Aguilera [G.], Montes [M. M.], Benítez [M. F.], Alonso [F.], Ruíz Díaz [F.] & Mirande [J. M.] 2026:296, Figs. 7-9 [Acta Zoológica Lilloana v. 70 (no. 1); ref. 43198] Miriñay stream lower part, route 123, under the bridge, lower Uruguay River basin, Corrientes, Argentina, 29°33'42.0"S, 57°30'36.6"W. Holotype: CI-FML 8301. Paratypes: CFA-IC, CI-FML, IBIGEO, LGEP, MACN, MHNM, ZVC. Plus additional non-type material. •Valid as Characidium mariposita Méttola, Terán, Serra, Aguilera, Montes, Benítez, Alonso, Ruíz Díaz & Mirande 2026. Current status: Valid as Characidium mariposita Méttola, Terán, Serra, Aguilera, Montes, Benítez, Alonso, et al. 2026. Crenuchidae: Characidiinae. Distribution: South America: middle and lower Paraná River and lower Uruguay River basins, Argentina and Uruguay. Habitat: freshwater.