micracanthus, Corydoras Regan [C. T.] 1912:211 [Annals and Magazine of Natural History (Series 8) v. 10 (no. 56); ref. 14865] Salta [Lesser, Bermejo River basin], 24°46'S, 65°28'W, Argentina [probably 24°40'39.50"S, 65°28'32.64"W]. Lectotype: BMNH 1897.1.27.8. Paralectotypes: BMNH 1897.1.27.9-14 (6), ZMA 109951 [ex BMNH 1897.1.27.15] (1). Additional material: BMNH (2) Salta, Argentina. Type catalog: Nijssen et al. 1982:46-47 [ref. 19236], Ferraris 2007:120 [ref. 29155]. Lectotype selected by Nijssen & Isbrücker 1980:206 [ref. 6910]. Information on type locality see Koerber & Terán 2021:140 [ref. 38314]. •Valid as Corydoras micracanthus Regan 1912 -- (Nijssen & Isbrücker 1980:206 [ref. 6910], Burgess 1989:366 [ref. 12860], Isbrücker 2001:230 [ref. 26805], Reis in Reis et al. 2003:300 [ref. 27061], López et al. 2003:42 [ref. 27366], Menni 2004:82 [ref. 28131], Ferraris 2007:120 [ref. 29155], Calviño & Alonso 2010:199, 206 [ref. 30829], Mirande & Koerber 2015:40 [ref. 35117], Ohara et al. 2016:548 [ref. 34772], Koerber & Terán 2021:143 [ref. 38314]). •Valid as Hoplisoma micracanthus (Regan 1912) -- (Dias et al. 2024:27 [ref. 41219]). Current status: Valid as Hoplisoma micracanthus (Regan 1912). Callichthyidae: Corydoradinae. Distribution: South America: upper Bermejo River basin (Salta Province, Argentina). Habitat: freshwater.