Fig. 12

Body elongated; greatest body depth contained 3.9 to 4.8 and caudal peduncle depth 8.9 to 11.1 times in SL; head length 4.4 to 4.8, predorsal distance 2.2 to 2.4 and caudal peduncle length 8.5 to 9.7 in SL; snout length 3.6 to 3.9, horizontal orbital diameter 3.5 to 4.4 and least interorbital width 4.6 to 5.1 in HL. Mouth terminal; isthmus covered by scales; premaxilla with 9, dentary with 10-11 teeth and maxilla toothless. Lateral line with 34-37 pored scales; transverse series above lateral line with 4 scale rows and below with 3½-4 scale rows. Dorsal fin with 11, pectoral fin with 13-14, pelvic fin with 9, anal fin with 9 rays, and caudal fin with 18-19 rays. Ground color pale yellow; dark-brown longitudinal stripe from humeral spot to caudal peduncle; eight to 10 dark-brown transverse bars on flank; black spot on the base of median caudal-fin rays. Hyaline fins (Graça, Pavanelli, 2007).

Maximum standard length. 70.0 mm (Graça, Pavanelli, 2007).

Distribution. Amazon and río Essequibo basins and coastal drainages of Guiana Shield.