petracinii, Corydoras Calviño [P. A.] & Alonso [F.] 2010:204, Fig. 2 [Revista del Museo Argentino de Ciencias Naturales, n.s. v. 11 (no. 2) [for 2009]; ref. 30829] Small stream, 200 meters from its ending into the San Lorenzo River, 24°47'08"S, 65°28'10"W, Finca Las Costas, around Salta city, Argentina, elevation 1222 meters. Holotype: MACN 9233. Paratypes: MCNI 1381 (5). •Valid as Corydoras petracinii Calviño & Alonso 2010 -- (Koerber 2011:5 [ref. 31122], Koerber 2014:8 [ref. 33621], Mirande & Koerber 2015:40 [ref. 35117], Ohara et al. 2016:548 [ref. 34772]). •Valid as Hoplisoma petracinii (Calviño & Alonso 2010) -- (Dias et al. 2024:27 [ref. 41219]). Current status: Valid as Hoplisoma petracinii (Calviño & Alonso 2010). Callichthyidae: Corydoradinae. Distribution: South America: San Lorenzo River basin, Argentina. Habitat: freshwater.