Sorubim lima (Bloch, Schneider, 1801)

Fig. 30

Body elongated; greatest depth contained 6.2 to 7.8 times in SL; head length 2.8 to 3.0, anal-fin base length 7.0 to 7.3, adipose-fin base length 14.6 to 15.0, maxillary-barbel length 2.3 to 3.0 in SL; snout length 2.0 to 2.2, horizontal orbital diameter 9.3 to 10.5, least interorbital width 2.7 to 3.0 in HL; orbital diameter 1.9 to 2.4 in interorbital width. Mouth subterminal, premaxilla much longer than dentary; dentigerous tooth plates in both premaxilla and dentary. Dorsal fin with I,6, pectoral fin with I,8-10, pelvic fin with 7 and anal fin with 17- 19 rays. Ground color dark-brown dorsally, whitish ventrally; two dark-brown longitudinal bands, with irregular borders, one along lateral line to median caudal-fin rays and another on dorsum. Hyaline fins (Graça, Pavanelli, 2007).

Maximum standard length. 605.0 mm (Graça, Pavanelli, 2007).

Distribution. Amazon, río Orinoco, río Paraná and rio Paranaíba basins.

Remarks. Sorubim lima 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.