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 Astyanax lacustris (Lütken, 1875) Fig. 7 Body deep; greatest depth contained 1.8 to 2.9 and caudal peduncle depth 6.6 to 10.1 times in SL; head length 3.0 to 4.4, predorsal distance 1.6 to 2.4 and caudal peduncle length 7.8 to 8.4 in SL; snout length 3.2 to 4.1, horizontal orbital diameter 2.3 to 4.7 and least interorbital width 1.9 to 3.3 in HL. Mouth terminal; inner row of premaxilla with 5 teeth, outer with 4 or 5, dentary with 8-16, and no maxillary teeth. Lateral line complete, with 33-41 pored scales; transverse series above lateral line with 6 to 8 scale rows and below with 4-8 scale rows. Dorsal fin with 12, pectoral fin with 12 or 13, pelvic fin with 8 or 9, anal fin with 22-34, and caudal fin with 19. Ground color silvery; one black rounded humeral blotch followed by another vertically elongated humeral blotch; silvery longitudinal band on flank (brown or grey in fixed specimens), from humeral blotch to median caudal-fin rays, larger on caudal peduncle, forming oval-shaped, horizontally elongated, blotch. Yellowish fins ( Graça, Pavanelli, 2007 ). Maximum standard length. 129.2 mm ( Graça, Pavanelli, 2007 ). Distribution. Río de la Plata basin, Laguna dos Patos and rio Tramandaí drainages, rio São Francisco ( Lucena, Soares, 2016 ) and, according to Garutti, Langeani (2009) , rio Tocantins-Araguaia basins. Remarks. Astyanax lacustris was identified as A. altiparanae by Graça, Pavanelli (2007) . Lucena, Soares (2016) , in a revisionary study of some species in the Astyanax bimaculatus (Linnaeus, 1758) group from Southern Neotropical river basins, proposed the new synonym.