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 Hoplosternum littorale (Hancock, 1828) Fig. 19 Body elongated; greatest depth contained 2.8 to 3.5 and caudal peduncle depth 8.8 to 9.4 times in SL; head length 2.9 to 3.8, predorsal distance 2.0 to 2.3 and maxillary-barbel length 1.5 to 3.2 in SL; snout length 1.9 to 2.3, horizontal orbital diameter 4.7 to 7.0 and least interorbital width 1.5 to 1.8 in HL. Mouth terminal. Lateral line with 4-6 pores on upper series of plates. Dorsolateral series with 25-27 and ventrolateral series with 22-24 plates. Dorsal fin with I,7, pectoral with I,9 or 10, pelvic fin with 6 and anal fin with 6-8 rays. Ground color dark-grey, lighter ventrally. Dark-grey fins ( Graça, Pavanelli, 2007 ). Maximum standard length. 220.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Widespread in South America rivers.