Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated Author Ota, Renata Rúbia Author Deprá, Gabriel de Carvalho Author Graça, Weferson Júnio da Author Pavanelli, Carla Simone text Neotropical Ichthyology 2018 2018-06-11 16 2 1 111 journal article 10.1590/1982-0224-20170094 f68fe85c-2a4c-4625-b684-74f61398d6c2 1982-0224 3678395 Hypostomus cochliodon Kner, 1854 Fig. 23 Body deep; greatest body depth contained 3.7 to 4.0 and caudal peduncle depth 9.1 to 10.4 times in SL; head length 3.7 to 4.1, predorsal distance 3.2 to 3.4, dorsal-fin spine length 3.7 to 4.1, pectoral-fin spine length 3.2 to 3.4, adipose-fin spine length 12.8 to 17.0 and caudal peduncle length 3.0 to 3.4 in SL; snout length 1.4 to 1.6, horizontal orbital diameter 6.1 to 6.3 and least interorbital width 1.8 to 2.0 in HL. Mouth inferior; premaxilla with 7 and dentary with 8 teeth. Mid-lateral series with 27 or 28, predorsal series with 3, and dorsal-fin base series with 8 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal fin with 6 rays. Ground color brown; dark-brown blotches on body, more conspicuous on head. Brown fins with black spots. Maximum standard length. 270.0 mm. ( Graça, Pavanelli, 2007 ). Distribution. Río Paraguay and middle río Paraná basins. Remarks. Hypostomus cochliodon is a non-native species from the upper rio Paraná , and its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.