alleni, Apomatoceros Eigenmann [C. H.] 1922:113, Pls. 3 (figs. 1-4), 4 (fig. 9) [Bijdragen tot de Dierkunde v. 22; ref. 1242] Río Morona, upper Amazon River system, Peru. Holotype (unique): CAS 56174 [ex IU 15500]. Type Catalog: Ferraris 2007:403 [ref. 29155]. •Valid as Apomatoceros alleni Eigenmann 1922 -- (Ortega & Vari 1986:15 [ref. 9708], Burgess 1989:324 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:273 [ref. 27061], Ferraris 2007:403 [ref. 29155], Barriga Salazar 2014:110 [ref. 35745], DoNascimiento 2015:941 [ref. 34078], Meza-Vargas et al. 2021:24 [ref. 39298]). Current status: Valid as Apomatoceros alleni Eigenmann 1922. Trichomycteridae: Stegophilinae. Distribution: South America: upper Amazon River system (Peru and Ecuador). Habitat: freshwater.