Pinirampus pirinampu (Agassiz, 1829)

Fig. 30

Body deep; greatest depth contained 5.1 to 5.3 times in SL; head length 4.2 to 4.5, anal-fin base length 7.6 to 8.5, adipose-fin base length 2.3 to 2.6, maxillary-barbel length 1.1 to 1.4 in SL; snout length 2.0 to 2.2, horizontal orbital diameter 7.0 to 9.2, least interorbital width 2.6 to 2.9 in HL; orbital diameter 2.6 to 3.5 in interorbital width. Mouth terminal; dentigerous tooth plates in both premaxilla and dentary. Dorsal fin with 7, pectoral fin with 13-17, pelvic fin with 7 and anal fin with 11-15 rays. Ground color greyish to pale brown. Dorsal, pectoral and caudal fins grey, pelvic and anal fins hyaline (Graça, Pavanelli, 2007).

M aximum standard length. 680.0 mm (Graça, Pavanelli, 2007).

Distribution. Amazon and río Essequibo basins, and Paraná-Paraguay system.