Myloplus tiete (Eigenmann, Norris, 1900)

Fig. 15

Body deep; greatest depth contained 1.2 to 1.6 and caudal peduncle depth 7.4 to 10.2 times in SL; head length 3.0 to 4.0, predorsal distance 1.5 to 1.7 and caudal peduncle length 10.9 to 12.0 in SL; snout length 2.6 to 3.4, horizontal orbital diameter 2.5 to 3.9 and least interorbital width 2.0 to 2.4 in HL. Mouth terminal; inner row of premaxilla with 4, outer row with 2; inner dentary row with 1, outer with 4; maxilla toothless. Lateral line complete, with 64-80 pored scales; transverse series above lateral line with 24-30 scale rows and below with 30-39 scale rows. Ventral keel with 43-45 simple spines, plus 6 pairs of spines. Dorsal fin with 24-27, pectoral fin with 14 or 15, pelvic fin with 9, anal fin with 31-38, and caudal fin with 19 rays. Ground color silvery. Dorsal, pectoral, pelvic and caudal fins hyaline; anal fin reddish with distal margin black (Graça, Pavanelli, 2007).

Maximum standard length. 262.0 mm (Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.