Aphyocharax dentatus (Eigenmann, Kennedy, 1903)

Fig. 9

Body elongate; greatest depth contained 3.8 to 4.7 and caudal peduncle depth 8.9 to 10.9 times in SL; head length 3.5 to 4.5, predorsal distance 1.8 to 2.0 and caudal peduncle length 7.2 to 7.6 in SL; snout length 3.2 to 4.6, horizontal orbital diameter 3.5 to 4.5 and least interorbital width 2.8 to 3.5 in HL. Mouth terminal, slightly prognathous; premaxilla with 4-8, dentary with 9-23 and maxilla with 8-17 teeth. Lateral line incomplete, with 8-13 pored scales; longitudinal series with 36- 42 scales; transverse series above lateral line with 5-7 scale rows and below with 3-4 scale rows. Dorsal fin with 9-11, pectoral fin with 10-14, pelvic fin with 7-8, anal fin with 16-22, and caudal fin with 19 rays (Lima, 2003). Ground color silvery; diffuse, oval transversely elongated, humeral spot; no other black marks on body and fin. Caudal fin red, other fins hyaline to yellowish (Graça, Pavanelli, 2007).

Maximum standard length. 60.0 mm (Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.

Remarks. Aphyocharax dentatus is a non-native species from the upper rio Paraná and its occurence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls (Graça, Pavanelli, 2007).