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 Hyphessobrycon eques (Steindachner, 1882) Fig. 8 Body moderately deep; greatest depth contained 2.7 to 2.9 and caudal peduncle depth 9.7 to 10.6 times in SL; head length 3.6 to 3.9, predorsal distance 1.9 to 2.0 and caudal peduncle length 8.6 to 11.1 in SL; snout length 4.0 to 4.5, horizontal orbital diameter 2.0 to 2.4 and least interorbital width 3.2 to 3.5 in HL. Mouth terminal; inner row of premaxilla with 3-5, outer row with 3-4, dentary with 8-11 and maxilla with 2-3 teeth. Lateral line incomplete, with 4-5 pored scales; longitudinal series with 29-33 scales; transverse series above lateral line with 5-6 scale rows and below with 3½-4 scale rows. Dorsal fin with 10-12, pectoral fin with 12-14, pelvic fin with 7 rays, anal fin with 28-32 and caudal fin with 19 rays. Ground color reddish in life; large, transversely elogate, black humeral blotch. Pelvic, caudal and anal fins red (latter with black margin); pectoral fin hyaline; dorsal fin with black blotch ( Graça, Pavanelli, 2007 ). Maximum standard length. 58.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Amazon basin and Paraná-Paraguay system.