longipinne, Xiphostoma Steindachner [F.] 1876:132 [84] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 74 (1. Abth.); ref. 4225] Mouth of Rio Negro, Brazil. Holotype (unique): NMW (not found). On p. 84 of separate. •Synonym of Boulengerella cuvieri (Spix & Agassiz 1829) or Boulengerella lucius (Cuvier 1816) -- (Vari 1995:74, 80 [ref. 21840]). •Questionably a synonym of Boulengerella lucius (Cuvier 1816) -- (Taphorn 1992:403 [ref. 23654]). •Synonym of Boulengerella cuvieri (Spix & Agassiz 1829) -- (Vari in Reis et al. 2003:252 [ref. 27061]). Current status: Synonym of Boulengerella cuvieri (Spix & Agassiz 1829). Ctenoluciidae. Habitat: freshwater.