Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated Author Ota, Renata Rúbia Author Deprá, Gabriel de Carvalho Author Graça, Weferson Júnio da Author Pavanelli, Carla Simone text Neotropical Ichthyology 2018 2018-06-11 16 2 1 111 journal article 10.1590/1982-0224-20170094 f68fe85c-2a4c-4625-b684-74f61398d6c2 1982-0224 3678395 Rhaphiodon vulpinus Spix, Agassiz, 1829 Fig. 12 Body deep; greatest depth contained 5.2 to 6.1 and caudal peduncle depth 16.1 to 17.3 times in SL; head length 4.8 to 5.3, predorsal distance 1.3 to 1.4 and caudal peduncle length 11.9 to 14.0 in SL; snout length 3.5 to 3.7, horizontal orbital diameter 4.6 to 4.7 and least interorbital width 6.1 to 6.2 in HL. Mouth superior, its cleft oblique; premaxilla with 14-16, dentary with 21-23 and maxilla with 15-17 teeth. Lateral line with 142-145 pored scales; transverse series above lateral line with 16-21 scale rows and below with 13-16 scale rows. Dorsal fin with 14, pectoral fin with 17 or 18, pelvic fin with 9, anal fin with 40-45, and caudal fin with 19 rays ( Toledo-Piza, 2000 ). Ground color silvery. Pectoral, pelvic and anal fins yellowish; dorsal and caudal fins hyaline ( Graça, Pavanelli, 2007 ). Maximum standard length. 780.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Río Orinoco, drainages of Guyana , Amazon and río de la Plata basins.