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 Galeocharax gulo (Cope, 1870) Fig. 9 Body deep; greatest depth contained 3.0 to 3.7 and caudal peduncle depth 11.5 to 13.9 times in SL; head length 3.0 to 3.5, predorsal distance 1.8 to 2.2 and caudal peduncle length 9.4 to 11.3 in SL; snout length 8 to 9.3, horizontal orbital diameter 3.9 to 4.6 and least interorbital width 3.6 to 4.8 in HL. Mouth slightly subterminal; premaxilla with 6-10 teeth, inner dentary row with 7-11, outer with 4 large plus 33-35 small and maxilla with 36-51 teeth. Lateral line complete, with 81-86 pored scales; transverse series above lateral line with 16-18 scale rows and below with 15-17 scale rows. Dorsal fin with 11 or 12, pectoral fin with 15 or 16, pelvic fin with 8, anal fin with 43-50, and caudal fin with 19 rays. Ground color silvery to yellowish; silvery longitudinal band on flank (brown or grey in preserved specimens), from humeral spot to caudal peduncle; black oval, vertically elongated, humeral spot. Hyaline fins ( Graça, Pavanelli, 2007 ). Maximum standard length. 257.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Río Orinoco, rio Oyapok, rio Araguaia- Tocantins , upper rio Paraná and Amazon (except the rio Negro and rio Xingu) basins ( Giovannetti et al. , 2017 ). Remarks. Galeocharax gulo was identified as G. knerii by Graça, Pavanelli (2007) . Giovannetti et al. (2017) , in a revisionary study of Galeocharax Fowler, 1910 , proposed the new synonym.