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 Corydoras sp. Fig. 19 Body deep and elliptical; greatest depth contained 3.0 and caudal peduncle depth 6.8 times in SL; head length 3.1, predorsal distance 6.5 and maxillary-barbel length 6.1 in SL; snout length 1.9, horizontal orbital diameter 3.8 and least interorbital width 3.0 in HL. Mouth inferior. Lateral line with 4 pores on upper series of plates. Dorsolateral series with 24 plates and ventrolateral series with 21 plates. Dorsal fin with II,8, pectoral with I,8, pelvic and anal fins with 6 rays. Ground color yellow to pale brown; six dark-brown spots on mid-line of flank; ventrolateral plates dark-grey posteriorly to pelvic fin; middle portion of caudal-fin base with dark-brown spot. Maximum standard length. 31.8 mm . Distribution. Only known from the Córrego Santa Maria, tributary of the rio Iguatemi, right bank of the upper rio Paraná . Remarks. Only two specimens of Corydoras sp. were captured in a tributary of the rio Iguatemi, in 2008 by V. F. B. Silva and collaborators. According to L. F. C. Tencatt (oral communication, 2011) this species is apparently new to science.