Gymnotus sylvius Albert, Fernandes-Matioli, 1999

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 : 57

Gymnotus sylvius Albert, Fernandes-Matioli, 1999

Fig. 16

Body elongated and compressed; greatest depth contained 7.0 to 9.3 times in TL; head length 7.1 to 8.2, anal-fin base length 1.2 in LEA; snout length 3.0 to 3.3, horizontal orbital diameter 12,8 to 14.0 and least interorbital width 2.6 to 2.7 in HL. Mouth superior, dentary prognathous. Pectoral fin with 15 or 16 rays and anal fin with 220-228 rays; transverse series above lateral line with 8 or 9 scale rows ( Albert et al., 1999). Ground color pale brown; body with light-beige transverse bars alternating with dark-brown transverse bars; light-beige bars wider than dark-brown bars. Anal fin with posterior portion light-beige ( Graça, Pavanelli, 2007).

Maximum total length. 360.0 mm ( Graça, Pavanelli, 2007).

Distribution. Rio Ribeira de Iguape, rio Paraíba do Sul and rio Pardo basins.

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.