Gymnotus inaequilabiatus (Valenciennes, 1839)

Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, Neotropical Ichthyology 16 (2), pp. 1-111 : 56-57

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.

Figures

Fig. 16. a. Apteronotus acidops, NUP 1750, 240.0 mm TL, Itaipu Reservoir, Guaíra, State of Paraná. b. Apteronotus aff. albifrons, 100.0 mm TL, uncat. c. Apteronotus cf. caudimaculosus, 260.0 mm TL, uncat. d. Apteronotus ellisi, 128.2 mm TL, uncat. e. Sternarchorhynchus britskii, 212.0 mm TL, uncat. f. Gymnotus inaequilabiatus, 238.0 mm TL, uncat. g. Gymnotus pantanal, NUP 13328, 138.6 mm SL, ribeirão Jacutinga, São Jorge do Ivaí, State of Paraná. h. Gymnotus paraguensis, 250.0 mm TL, uncat. i. Gymnotus sylvius, MZUSP 83538, paratype, 260.0 mm TL, rio Ribeira de Iguape, next to Miracatu, Miracatu, State of São Paulo.