Apareiodon affinis (Steindachner, 1879)

Fig. 14

Body elongated; greatest body depth contained 3.2 to 5.4 and caudal peduncle depth 8.2 to 10.8 times in SL; head length 3.8 to 4.9, predorsal distance 1.9 to 2.2 and caudal peduncle length 7.0 to 12.1 in SL; snout length 2.6 to 3.6, horizontal orbital diameter 3.1 to 4.6, least interorbital width 2.3 to 3.4 and dentary width 3.7 to 5.9 in HL. Mouth subterminal; premaxilla with 4 or 5, maxilla with 2 or 3 and dentary with no teeth. Lateral line with 39-46 pored scales; transverse series above lateral line with 4½ or 5 scale rows and below with 3 or 4½ scale rows. Dorsal fin with 10-13, pectoral fin with 11-14, pelvic fin with 7-9, anal fin with 7 or 8 rays and caudal fin with 18 or 19 rays (Pavanelli, 1999). Ground color silvery to pale yellow; black longitudinal band along lateral line, from opercle to median caudal-fin rays, without adjacent brown or grey blotches downwards; six to eight dark-brown transverse bars above longitudinal band. Hyaline fins or with few scattered brown cromathophores (Graça, Pavanelli, 2007).

Maximum standard length. 151.0 mm (Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.