pachycheilus, Leporinus Britski [H. A.] 1976:87, Figs. 1-2 [Acta Amazonica v. 6 (no. 4) (Supl.); ref. 7365] Rio Aripuana, Mato Grosso State, Brazil. Holotype: MZUSP 13074. Paratypes: MZUSP 13075-87 (13). Type catalog: Oyakawa 1996:476 [ref. 23140]. •Valid as Leporinus pachycheilus Britski 1976 -- (Santos & Jégu 1990:171 [ref. 20180], Santos & Jégu 1996:162 [ref. 23717], Santos et al. 1996:267 [ref. 23716], Britski 1997:37 [ref. 24113], Garavello & Britski in Reis et al. 2003:77 [ref. 27061]). •Valid as Hypomasticus pachycheilus (Britski 1976) -- (Sidlauskas & Vari 2008:74 [ref. 29786], Birindelli et al. 2013:464 [ref. 32924]). Current status: Valid as Hypomasticus pachycheilus (Britski 1976). Anostomidae. Distribution: South America: Aripuanã River drainage, Mato Grosso, Brazil. Habitat: freshwater.