longior, Tetragonopterus Cope [E. D.] 1878:691 [Proceedings of the American Philosophical Society v. 17 (no. 101); ref. 945] Moyabamba on Río Huallaga, Peru. Lectotype: ANSP 21222. Paralectotypes: ANSP 21223 (1). Type catalog: Böhlke 1984:50 [ref. 13621] as holotype and paratype. Lectotype established by Fowler 1906:341, Fig. 29 [not 30] [ref. 1373]. •Valid as Astyanax longior (Cope 1878) -- (Ortega & Vari 1986:7 [ref. 9708], Buckup in Reis et al. 2003:110 [ref. 27061], Meza-Vargas et al. 2021:17 [ref. 39298]). Current status: Valid as Astyanax longior (Cope 1878). Characidae: Stethaprioninae. Distribution: South America: upper Amazon River basin (Peru). Habitat: freshwater.