castroi, Sternopygus Triques [M. L.] 2000:21, Fig. 1 [Studies on Neotropical Fauna and Environment v. 35; ref. 25027] Igarapé, Jaradá, tributary of the right margin of Rio Cuieiras, about 40 kilometers from its mouth on Rio Negro, about 2°40'S, 60°20'W, AM, Brazil. Holotype: MZUSP 48912. Paratypes: MZUSP 47987-88 (1, 1), 48911 (1). Type catalog: Ferraris et al. 2017:[35] [ref. 35236]. •Valid as Sternopygus castroi Triques 2000 -- (Albert in Reis et al. 2003:489 [ref. 27061], Crampton et al. 2004:248 [ref. 27652], Crampton et al. 2004:124 [ref. 27764]). •Synonym of Sternopygus astrabes Mago-Leccia 1994 -- (Hulen et al. 2005:410 [ref. 28485], Ferraris et al. 2017:[35] [ref. 35236]). Current status: Synonym of Sternopygus astrabes Mago-Leccia 1994. Sternopygidae: Sternopyginae. Habitat: freshwater.