anisurus, Metynnis Ahl [E.] 1923:27, Fig. 2 [Mitteilungen aus dem Zoologischen Museum in Berlin v. 11 (no. 1); ref. 19929] Rio Tapajos, Amazon system, Brazil. Holotype (unique): ZMB 20678. •Synonym of Metynnis lippincottianus (Cope 1870) -- (Zarske & Géry 1999:205 [ref. 23984], Jégu in Reis et al. 2003:184 [ref. 27061], Zarske & Géry 2008:189 [ref. 29917]). •Valid as Metynnis anisurus Ahl 1923 -- (Ota et al. 2024:406 [ref. 40817]). Current status: Valid as Metynnis anisurus Ahl 1923. Serrasalmidae: Serrasalminae. Distribution: South America: lower Amazon basin, Brazil. Habitat: freshwater.