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peruanus, Chasmocranus Eigenmann [C. H.] & Pearson [N. E.] in Eigenmann & Allen 1942:91, Pl. 3 (figs. 3-4) [Fishes of western South America; ref. 1246] Puerto Melendez below Pongo de Manseriche, Río Marañon, Peru. Holotype: CAS 63627 [ex IU 15869] (1 of 2). Paratypes: CAS 63627 [ex IU 15869] (1 of 2, missing). Type catalog: Ferraris 2007:183 [ref. 29155]. Based on Plate 3, the smaller specimen should be the holotype if it can be distinguished from the slightly larger one. •Valid as Heptapterus peruanus (Eigenmann & Pearson 1942) -- (Burgess 1989:277 [ref. 12860]). •Valid as Imparfinis peruanus (Eigenmann & Pearson 1942) -- (Ortega-Lara et al. 2011:778 [ref. 31716]). •Valid as Chasmocranus peruanus Eigenmann & Pearson 1942 -- (Ortega & Vari 1986:14 [ref. 9708], Bockmann & Guazzelli in Reis et al. 2003:412 [ref. 27061], Ferraris 2007:183 [ref. 29155], Meza-Vargas et al. 2021:24 [ref. 39298]). Current status: Valid as Chasmocranus peruanus Eigenmann & Pearson 1942. Heptapteridae: Heptapterinae. Distribution: South America: upper Amazon River basin (Peru). Habitat: freshwater.
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