oseryi, Xiphostoma Castelnau [F. L.] 1855:76, Pl. 40 (fig. 1) [Animaux nouveaux or rares v. 2; ref. 766] Rio Tocantins, Pará, Brazil. Holotype (unique): MNHN 0000-4233 (head and skin). •Synonym of Boulengerella lucius (Cuvier 1816) -- (Taphorn 1992:403 [ref. 23654]). •Synonym of Boulengerella cuvieri (Spix & Agassiz 1829) -- (Vari 1995:74 [ref. 21840], Vari in Reis et al. 2003:252 [ref. 27061]). Current status: Synonym of Boulengerella cuvieri (Spix & Agassiz 1829). Ctenoluciidae. Habitat: freshwater.