Fig. 4

Body elongated; greatest depth contained 3.8 to 4.3, and caudal peduncle depth 10.0 to 10.2 times in SL; head length 3.9 to 4.0, predorsal distance 2.0, caudal peduncle length 7.0 to 7.9 in SL; snout length 2.0 to 2.5, horizontal orbital diameter 2.9 to 3.8 and least interorbital width 6.7 to 8.4 in HL. Mouth subterminal; premaxilla and dentary with 3 teeth, no maxillary teeth. Lateral line with 37-40 pored scales; transverse series above lateral line with 5 scale rows and below with 4 scale rows. Dorsal fin with 12, pectoral fin with 18, pelvic fin with 9, anal fin with 10 and caudal fin with 19 rays (Garavello, Britski, 1987). Ground color pale yellow; dark-brown longitudinal band along lateral line, from posterior margin of opercle to caudal-fin base; 10-12 dark-brown transverse bars on dorsal surface, extending downward, not reaching longitudal band. Hyaline fins; distal margin of dorsal fin black (Graça, Pavanelli, 2007).

Maximum standard length. 100.5 mm (Graça, Pavanelli, 2007).

Distribution. Río Paraná basin.