Serrapinnus sp. 1

Fig. 10

Body elongated; greatest body depth contained 2.2 to 2.5 and caudal peduncle depth 7.9 to 9.8 times in SL; head length 4.3 to 4.5, predorsal distance 1.9 to 2.0 and caudal peduncle length 9.0 to 10.7 in SL; snout length 3.3 to 3.6, horizontal orbital diameter 2.3 to 3.2 and least interorbital width 2.8 to 3.0 in HL. Mouth terminal; premaxilla with 5 or 6, dentary with 8-10 and maxilla with 2 or 3 teeth. Lateral line incompletely pored, with 7-9 pored scales; longitudinal series with 30-32 scales; transverse series above lateral line with 3½ or 4 scale rows and below with 3 or 3½ scale rows. Dorsal fin with 10 or 11, pectoral fin with 12 or 13, pelvic fin with 8 or 9, anal fin with 19-24 and caudal fin with 19 rays. Ground color whitish; dark-brown longitudinal stripe on flank, from pseudotympanum to caudal peduncle; dark-brown rounded blotch on posterior portion of caudal peduncle and caudal-fin base, not extended to median caudal-fin rays (Graça, Pavanelli, 2007).

Maximum standard length. 53.0 mm (Graça, Pavanelli, 2007).

Distribution. Upper rio Paraná basin.