Serrasalmus marginatus Valenciennes, 1837

Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, Neotropical Ichthyology 16 (2), pp. 1-111 : 53-54

Serrasalmus marginatus Valenciennes, 1837

Fig. 15

Body deep; greatest depth contained 1.8 to 1.9 and caudal peduncle depth 11.0 to 13.9 times in SL; head length 2.9 to 3.1, predorsal distance 1.7 to 1.8 and caudal peduncle length 13.9 to 14.6 in SL; snout length 4.2 to 4.4, horizontal orbital diameter 3.0 to 3.7 and least interorbital width 3.4 to 4.5 in HL. Mouth terminal, dentary prognathous; premaxilla with 6, dentary with 7, maxilla with no teeth and palate with 4-7 teeth. Lateral line with 74-79 pored scales; transverse series above and below lateral line with 26-30 scale rows. Dorsal and pectoral fin with 15-17, pelvic fin with 7, anal fin with 32-36 and caudal fin with 19 rays. Ground color silvery; several dark-brown rounded blotches on body. Caudal and anal fins completely or partially black, including thin hyaline distal margin; remaining fins hyaline or yellowish, with few scattered black spots ( Graça, Pavanelli, 2007).

Maximum standard length. 260.0 mm ( Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.

Remarks. Serrasalmus marginatus is a non-native species from the upper rio Paraná. Its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.

Figures

Fig. 15. a. Colossoma macropomum, 250.0 mm SL, uncat. b. Metynnis lippincottianus, NUP 443, 149.3 mm SL, lagoas (ilhas), Porto Rico, State of Paraná. c. Myloplus tiete, NUP 2484, 135.0 mm SL, rio Piquiri, Formosa do Oeste, State of Paraná. d. Piaractus mesopotamicus, 498.0 mm SL, fresh specimen, uncat. e. Serrasalmus maculatus, NUP 396, 157.2 mm SL, canal do Meio (ilha Porto Rico), Porto Rico, State of Paraná. f. Serrasalmus marginatus, NUP 439, 160.2 mm SL, lagoas (ilhas), Porto Rico, State of Paraná. g. Triportheus nematurus, 102.0 mm SL, fresh specimen, uncat.