nummus, Brachychalcinus Böhlke [J. E.] 1958:74, Pl. 4 (fig. 5) [Proceedings of the Academy of Natural Sciences of Philadelphia v. 110; ref. 12050] Lower Río Bobonaza, Province Napo-Pastaza, Chicherota, 2°23'S, 76°30'W, Ecuador, elevation 270 meters. Holotype: USNM 164019. Paratypes: ANSP 75936-38 (2, 1, 1); Géry coll. [ex ANSP 75939] (1); USNM 164044 (2), 164058-59 (2, 1), 164069 (2), 175141 (1). Type catalog: Böhlke 1984:51 [ref. 13621], Vari & Howe 1991:8-9 [ref. 19022]. •Valid as Brachychalcinus nummus Böhlke 1958 -- (Ovchynnyk 1967:27 [ref. 37559] as Brachychalcium nummus, Ortega & Vari 1986:7 [ref. 9708], Reis 1989:73 [ref. 14219], Reis in Reis et al. 2003:209 [ref. 27061], Barriga Salazar 2014:109 [ref. 35745], Sarmiento et al. 2014:184 [ref. 35004], DoNascimiento et al. 2017:46 [ref. 35633], Garcia-Ayala et al. 2017:570 [ref. 35695], Meza-Vargas et al. 2021:17 [ref. 39298], Garcia-Ayala et al. 2024:9 [ref. 40855]). Current status: Valid as Brachychalcinus nummus Böhlke 1958. Acestrorhamphidae: Stethaprioninae. Distribution: South America: upper Amazon River basin (Colombia, Ecuador, Bolivia and Peru). Habitat: freshwater.