Serrapinnus notomelas

Overview & Synopsis

Serrapinnus notomelas (Eigenmann, 1915) Fig. 10 Body elongated; greatest body depth contained 2.4 to 2.8 and caudal peduncle depth 8.2 to 8.6 times in SL; head length 3.5 to 4.0, predorsal distance 1.8 to 2.0 and caudal peduncle length 9.5 to 10.3 in SL; snout length 3.5 to 3.8, horizontal orbital diameter 2.3 to 3.2 and least interorbital width 2.6 to 3.0 in HL. Mouth terminal; premaxilla with 4 or 5, dentary with 6 or 7 and maxilla with 1 or 2 teeth. Lateral line incompletely pored, with 5-7 pored scales; longitudinal series with 30-34 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 diffuse longitudinal stripe on flank, from pseudotympanum to caudal peduncle; black rounded blotch on posterior portion of caudal peduncle and caudal-fin base, not extended to median caudal-fin rays. Dorsal fin with black chromatophores along two unbranched and first branched rays and proximal half of remaining; pectoral, pelvic, anal and caudal fins yellowish (Graça, Pavanelli, 2007). Maximum standard length. 40.0 mm (Graça, Pavanelli, 2007). Distribution. Upper rio Paraná basin.