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 Loricariichthys 1. Snout short, contained 2.2 to 2.3 times in head length; orbital diameter contained 3.7 to 4.6 times in head length ..................................................................... L. platymetopon 1’. Snout elongated, contained 1.9 to 2 times in head length; orbital diameter contained 5.3 to 6.5 times in head length................................................................... L. rostratus Loricariichthys platymetopon Isbrücker, Nijssen, 1979 Fig. 26 Body depressed; greatest body depth contained 10.0 to 11.9 and caudal peduncle depth 37.0 to 58.8 times in SL; head length 4.0 to 4.5, predorsal distance 2.9 to 3.2, dorsal-fin spine length 4.0 to 5.1, pectoral-fin spine length 5.5 to 7.0 and pelvic-fin spine length 5.6 to 6.3 in SL; snout length contained 2.2 to 2.3, horizontal orbital diameter 3.7 to 4.6 and least interorbital width 3.1 to 4.5 times in HL. Mouth inferior; pre-maxilla with 7-14 and dentary with 10- 20 teeth. Mid-lateral series with 31-32 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal with 6 rays ( Reis, Pereira, 2000 ). Ground color brownish; dark-brown blotches, sometimes forming irregular and transverse bars. Hyaline fins with few dark-brown spots ( Graça, Pavanelli, 2007 ). Maximum standard length. 282.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Río de la Plata basin. Remarks. Loricariichthys platymetopon is a non-native species from the upper rio Paraná , and its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.