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 Gymnotus inaequilabiatus (Valenciennes, 1839) Fig. 16 Body elongated and compressed; greatest depth contained 7.1 to 13.3 times in TL; head length 8.3 to 11.1, anal-fin base length 1.3 in LEA; snout length 2.9 to 3.3, horizontal orbital diameter 13.9 to 15.4 and least interorbital width 2.3 to 2.4 in HL. Mouth superior, dentary prognathous. Pectoral fin with 13-16 rays and anal fin with 170-260 rays; transverse series above lateral line with 6-8 scale rows. Ground color pale brown; body with light-beige transverse bars alternating with dark-brown transverse bars, visible in specimens with less than 250.0 mm TL; in larger specimens stripes can be broken or disappear, resulting in color pattern with dark-brown rounded or irregular blotches, especially on dorsal region of body; dark-brown bars wider than lightbeige bars. Hyaline fins, with scattered dark-brown spots ( Graça, Pavanelli, 2007 ). Maximum total length. 600.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Paraná-Paraguay system.