Eigenmannia guairaca Peixoto, Dutra, Wosiacki, 2015

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 : 59

Eigenmannia guairaca Peixoto, Dutra, Wosiacki, 2015

Fig. 17

Body elongated and compressed; greatest body depth contained 5.9 to 7.0 times in TL; head length 6.5 to 8.3, anal-fin base length 0.7 to 1.2, caudal filament length 2.8 to 4.5, preanal distance 5.0 to 6.0 and prepectoral distance 6.1 to 7.7 in LEA; snout length 3.8 to 4.9, horizontal orbital diameter 6.7 to 8.8 and least interorbital width 2.7 to 3.5 in HL. Mouth terminal; premaxilla with 9 or 10 teeth distributed in two rows. Pectoral fin with 12 or 13 rays and anal fin with 151-170 rays. Lateral line complete, with 110- 143 pored scales; transverse series above lateral line with 9-11 scale rows. Ground color pale brown; four dark-brown longitudinal stripes on flank (one superior medial, one lateral line, one inferior medial and one at anal-fin base).

Maximum total length. 173.0 mm TL.

Distribution. Tributaries of the rio Iguatemi, and riacho Água do Ó, tributary of rio Paranapanema, upper rio Paraná basin.

Remarks. Peixoto et al. (2015) reviewed the Eigenmannia trilineata species-group, described the new species, E. guaiaraca , from the riacho Água do Ó, tributary of the rio Paranapanema, upper rio Paraná basin, and restricted the distribution of E. trilineata to the lower rio Paraná basin. Analyzing additional material hosted at Coleção Ictiológica do Nupélia, specimens similar to E. guairaca were found in tributaries of the rio Iguatemi, right bank of the upper rio Paraná, and specimens similar to those redescribed as E. trilineata by Peixoto et al. (2015) in the upper rio Paraná floodplain and some of its tributaries (e.g. rio Paracaí). Therefore, the occurrence of both species in the studied region has been recorded.

Figures

Fig. 17. a. Brachyhypopomus gauderio, NUP 2510, 112.2, lagoa do Aurélio, Taquarussu, State of Mato Grosso do Sul. b. Gymnorhamphichthys britskii, NUP 3337, 115.0 mm TL, rio Baía, Taquarussu, State of Mato Grosso do Sul. c. Rhamphichthys hahni, 567.3 mm TL, uncat. d. Eigenmannia guairaca, NUP 16151, 112.3 mm TL, córrego Água Boa, tributary of the rio Iguatemi, Mundo Novo, Mato Grosso do Sul State. e. Eigenmannia trilineata, 109.2 mm TL, fresh specimen, uncat. f. Eigenmannia virescens, 205.0 mm TL, uncat. g. Sternopygus macrurus, NUP 2096, 280.0 mm TL, rio Paraná, Porto Rico, State of Paraná.