Megalancistrus parananus (Peters, 1881)

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 : 75

Megalancistrus parananus (Peters, 1881)

Fig. 25

Body deep; greatest body depth contained 4.0 to 4.7 and caudal peduncle depth 6.0 to 6.5 times in SL; head length 2.8 to 3.2, predorsal distance 2.2 to 2.4, dorsal-fin spine length 4.1 to 4.4, pectoral-fin spine length 3.8 to 4.3 and caudal peduncle length 3.5 to 3.8 in SL; snout length 1.2 to 1.4, horizontal orbital diameter 5.0 to 6.2 and least interorbital width 1.6 to 2.0 in HL. Mouth inferior; premaxilla with 6-8 and dentary with 8-10 teeth. Mid-lateral series with 25, predorsal series with 3, and dorsal-fin base series with 12 plates. Dorsal fin with I,10-15, pectoral fin with I,6, pelvic fin with i,5 and anal fin with 6 rays. Ground color lightbeige; several dark-brown blotches on body, as well as fins.

Maximum standard length. 504.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río de la Plata basin.

Figures

Fig. 25. a. Megalancistrus parananus, NUP 528, 205.0 mm SL, rio Baía, Taquarussu, State of Mato Grosso do Sul. b. Pterygoplichthys ambrosettii, 395.0 mm SL, fresh specimen, uncat.