Platydoras armatulus (Valenciennes, 1840)

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 : 65-66

Platydoras armatulus (Valenciennes, 1840)

Fig. 20

Body deep; greatest body depth contained 3.2 to 3.9, head length 3.8 to 4.0 times in SL; snout length contained 2.2 to 2.3, horizontal orbital diameter 4.8 to 5.5 and least interorbital width 2.5 to 2.7 times in HL; orbital diameter contained 1.8 to 2.1 times in interorbital width. Mouth terminal; with dentigerous plates in both premaxilla and dentary. Lateral line with 27-28 plates. Dorsal fin with I,6, pectoral fin with I,7, pelvic fin with 7 and anal fin with 10-12 rays ( Graça, Pavanelli, 2007). Ground color darkbrown above pelvic-fin orign, whitish to yellowish below; yellowish longitudinal band, from dorsal region of head to distal margin of median caudal-fin rays. Dorsal, pelvic, anal and caudal fins hyaline or light-beige; dorsal fin with dark-brown blotch on distal margin; pectoral fin darkbrown, its spine light-beige; caudal fin with one dark-brown longitudinal band on each lobe.

Maximum standard length. 178.0 mm ( Graça, Pavanelli, 2007).

Distribution. Paraná-Paraguay system.

Remarks. Platydoras armatulus is a non-native species from 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. 20. a. Ossancora eigenmanni, NUP 6326, 99.1 mm SL, Rosana Reservoir, rio Paranapanema, Diamante do Norte, State of Paraná. b. Platydoras armatulus, NUP 1052, 132.9 mm SL, baia Sinhá Mariana, Barão de Melgaço, State of Mato Grosso. c. Pterodoras granulosus, 600.0 mm SL, fresh specimen, uncat. d. Rhinodoras dorbignyi, 135.5 mm SL, fresh specimen, uncat. e. Trachydoras paraguayensis, 125.0 mm SL, fresh specimen, uncat.