acsi, Spinipterus Akama [A.] & Ferraris [C. J., Jr.] 2011:53, Figs. 1-3 [Zootaxa No. 2992; ref. 31467] Caño "Santa Rita" (right bank tributary of river Nanay), 3.32 mi north-west of center of Iquitos, 3°45'23"S, 73°17'28"W, Maynas Province, Depto. Loreto, Peru. Holotype (unique): ANSP 178209. •Valid as Spinipterus acsi Akama & Ferraris 2011 -- (Birindelli 2014:535 [ref. 33501], Calegari et al. 2018:695 [ref. 36104], Calegari et al. 2019:[89] [ref. 36961], Rocha et al. 2019:249 [ref. 37162], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Spinipterus acsi Akama & Ferraris 2011. Auchenipteridae: Auchenipterinae. Distribution: South America: upper Amazon River basin (Peru and Brazil). Habitat: freshwater.