Potamotrygon cf. falkneri Castex, Maciel, 1963

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 : 16

Potamotrygon cf. falkneri Castex, Maciel, 1963

Fig. 2

Body depressed; disc length contained 1.0 to 1.1 times in disc width (DW); distance from mouth to cloaca 1.4 to 1.6, distance from cloaca to caudal sting 1.7 to 2.1, tail length 1.0, and caudal sting length 4.2 to 6.0 in DW; mouth width 9.9 to 12.9, tail width 7.6 to 9.8 in DW; tail length 1.0 in disc length (DL); horizontal orbital diameter 2.3 to 3.9 in least interorbital width. Mouth inferior; upper jaw with 22-50 teeth and lower jaw with 26 to 44 teeth. Pectoral fin with 95-99 rays; mid-dorsal spines 18-56 ( Rosa, 1985). Dorsal disc coloration brown, with numerous oval-shaped to reniform, yellow (occasionally black-margined) ocelli, usually wider than eye diameter ( Graça, Pavanelli, 2007).

Maximum disc length. 780.0 mm ( Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.

Remark. Potamotrygon cf. falkneri is a non-native species in the upper rio Paraná and its occurrence can be associated with the filling of the Itaipu Reservoir and the consequent inundation of the Sete Quedas Falls.

Figures

Fig. 2. a. Potamotrygon amandae, 420.0 mm TL, fresh specimen, uncat. b. Potamotrygon cf. falkneri, 780.0 mm TL, fresh specimen, uncat. c. Platanichthys platana, NUP 16904, 28.9 mm SL, lagoa das Garças, tributary of the rio Paraná, Batayporã, State of Mato Grosso do Sul. d. Cyprinus carpio, NUP 1414, 203.3 mm SL, estação de piscicultura (CODAPAR-UEM), Maringá, State of Paraná.