Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated Ota, Renata Rúbia Deprá, Gabriel de Carvalho Graça, Weferson Júnio da Pavanelli, Carla Simone Neotropical Ichthyology 2018 2018-06-11 16 2 1 111 959T (Lutken, 1875) Lutken 1875 [909,1369,1169,1193] Actinopterygii Acestrorhynchidae Acestrorhynchus Animalia Characiformes 16 17 Chordata species lacustris    Fig. 3  Body elongated; greatest depth contained 4.2 to 5.3 and caudal peduncle depth 13.2 to 15.6 times in SL; head length 3.1 to 3.6, predorsal distance 1.5 to 1.7 and caudal peduncle length 12.5 to 14.0 in SL; snout length 2.5 to 2.8, horizontal orbital diameter 2.8 to 5.0 and least interorbital width 4.0 to 5.4 inHL. Mouth terminal; outer row of premaxilla with 13-16 and inner row with 10-20, and maxilla with 16-39 teeth. Lateral line complete, with 86- 102 pored scales; transverse series above lateral line with 22-25 and below with 13-15 scale rows. Dorsal fin with 11, pectoral fin with 14-18, pelvic fin with 8, anal fin with 23- 27, and caudal fin with 19 rays ( Menezes, 1992). Ground color silvery to yellowish; black rounded humeral blotch; black oval, horizontally elongated, blotch on caudal-fin base, extending to median caudal-fin rays. Yellowish fins ( Graça, Pavanelli, 2007).  Maximum standard length.280.0 mm ( Graça, Pavanelli, 2007).   Distribution.Upper rio Paranáand rio São Francisco basins.