Serrapinnus sp. 2

Fig. 10

Body elongated; greatest body depth contained 2.8 to 3.9 and caudal peduncle depth 8.0 to 10.7 times in SL; head length 4.0 to 4.6, predorsal distance 1.8 to 2.0 and caudal peduncle length 9.7 to 10.8 in SL; snout length 3.1 to 3.9, horizontal orbital diameter 2.0 to 2.6 and least interorbital width 2.5 to 3.5 in HL. Mouth terminal; premaxilla with 4 or 5, dentary with 6, and maxilla with 2 teeth. Lateral line incompletely pored, with 6 or 7 pored scales; longitudinal series with 31-34 scales; transverse series above lateral line with 3½ scale rows and below with 3 or 3½ scale rows. Dorsal fin with 11, pectoral fin with 12 or 13, pelvic fin with 8 or 9, anal fin with 20-22 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. Hyaline fins; dorsal and anal fins with distal portion black (Graça, Pavanelli, 2007).

Maximum standard length. 29.0 mm (Graça, Pavanelli, 2007).

Distribution. Upper rio Paraná basin.