armillatus, Pariolius Cope [E. D.] 1872:289 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 23; ref. 921] Río Ambyiacu, Peru. Holotype (unique): ANSP 22004. Type catalog: Böhlke 1984:141 [ref. 13621], Ferraris 2007:188 [ref. 29155] •Valid as Heptapterus armillatus (Cope 1872) -- (Ortega & Vari 1986:14 [ref. 9708], Burgess 1989:276 [ref. 12860]). •Valid as Pariolius armillatus Cope 1872 -- (Bockmann & Guazzelli in Reis et al. 2003:416 [ref. 27061], Ferraris 2007:188 [ref. 29155], Barriga Salazar 2014:114 [ref. 35745], DoNascimiento et al. 2017:91 [ref. 35633], Meza-Vargas et al. 2021:24 [ref. 39298], Faustino-Fuster et al. 2024:399 [ref. 41011]). Current status: Valid as Pariolius armillatus Cope 1872. Heptapteridae: Heptapterinae. Distribution: South America: western Amazon River basin (Brazil, Ecuador, Colombia and Peru). Habitat: freshwater.