longibarbis, Dianema Cope [E. D.] 1872:276, Pl. 7 (figs. 1, 1a-b) [Proceedings of the Academy of Natural Sciences of Philadelphia v. 23; ref. 921] Río Ambyiacu, Peru. Syntypes: ANSP 8285 (1), 21540 (1). Type catalog: Böhlke 1984:32 [ref. 13621] as holotype and paratypes, Ferraris 2007:127 [ref. 29155]. •Valid as Dianema longibarbis Cope 1872 -- (Ovchynnyk 1967:37 [ref. 37559], Ortega & Vari 1986:16 [ref. 9708], Burgess 1989:364 [ref. 12860], Lasso et al. 2001:98 [ref. 25928], Reis in Reis et al. 2003:304 [ref. 27061], Ferraris 2007:127 [ref. 29155], Barriga Salazar 2014:111 [ref. 35745], Sarmiento et al. 2014:190 [ref. 35004], DoNascimiento et al. 2017:72 [ref. 35633], Meza-Vargas et al. 2021:25 [ref. 39298]). Current status: Valid as Dianema longibarbis Cope 1872. Callichthyidae: Callichthyinae. Distribution: South America: Amazon River basin (Brazil, Ecuador, Colombia, Bolivia and Peru). Habitat: freshwater.