Pimelodus maculatus Lacépède, 1803

Fig. 29

Body deep; greatest depth contained 3.7 to 4.0 times in SL; head length 3.3 to 3.7, anal-fin base length 7.4 to 8.6, adipose-fin base length 4.2 to 4.4, maxillary-barbel length 0.9 to 1.4 in SL; snout length 2.0 to 2.3, horizontal orbital diameter 4.5 to 6.0, least interorbital width 3.3 to 3.8 in HL (Deprá et al., 2015); orbital diameter 0.8 to 1.2 in interorbital width. Mouth terminal; dentigerous tooth plates in both premaxilla and dentary; teeth absent in vomer and metapterygoid. Dorsal fin with I,6 rays, pectoral fin with I,11-14, pelvic fin with 6 and anal fin with 11-14 rays. Ground color yellowish; longitudinal series of dark-brown blotches. Dark-grey fins with black spots, especially on caudal and adipose fins (Graça, Pavanelli, 2007).

Maximum standard length. 275.0 mm (Deprá et al., 2015)

Distribution. Río de la Plata basin.