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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., Published as part of 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, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 59, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395, {"references":["Peixoto LAW, Dutra GM, Wosiacki WB. The electric glass knifefishes of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae): monophyly and description of seven new species. Zool J Linn Soc. 2015; 175 (2): 384 - 414."]}