polystictus, Corydoras Regan [C. T.] 1912:216 [Annals and Magazine of Natural History (Series 8) v. 10 (no. 56); ref. 14865] Upper Rio Paraguay, Descalvados, 16°45'S, 57°40'W, Mato Grosso State, Brazil. Lectotype: BMNH 1895.5.17.62. Paralectotypes: BMNH 1895.5.17.63 (1). Type catalog: Ferraris 2007:123 [ref. 29155]. Lectotype selected by Nijssen & Isbrücker 1980:197 [ref. 6910]. •Valid as Corydoras polystictus Regan 1912 -- (Nijssen & Isbrücker 1980:197 [ref. 6910], Burgess 1989:367 [ref. 12860], Isbrücker & Nijssen 1992:13 [ref. 20559], Britski et al. 1999:126 [ref. 24147], Isbrücker 2001:233 [ref. 26805], Reis in Reis et al. 2003:301 [ref. 27061], López et al. 2003:43 [ref. 27366], Menni 2004:82 [ref. 28131], Ferraris 2007:123 [ref. 29155], Calviño & Alonso 2010:200 [ref. 30829], Espíndola et al. 2014:26 [ref. 33269], Sarmiento et al. 2014:190 [ref. 35004], Cardoso et al. 2015:1 [ref. 35092], Mirande & Koerber 2015:40 [ref. 35117], Tencatt & Ohara 2016:[12] [ref. 34353], Ottoni et al. 2016:133 [ref. 34756], Koerber et al. 2017:58 [ref. 35267]). •Valid as Hoplisoma polystictum (Regan 1912) -- (Dias et al. 2024:27 [ref. 41219], Koerber 2024:5 [ref. 41228]). Current status: Valid as Hoplisoma polystictum (Regan 1912). Callichthyidae: Corydoradinae. Distribution: South America: Paraguay River basin (Argentina, Brazil, Paraguay and Bolivia). Habitat: freshwater.