Ageneiosus inermis (Linnaeus, 1766),

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: 60

publication ID 10.1590/1982-0224-20170094


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Ageneiosus inermis (Linnaeus, 1766)


Ageneiosus inermis (Linnaeus, 1766) 

Fig. 18View Fig

Body deep; greatest body depth contained 4.5 to 5.0 times in SL; head length 3.1 to 3.6, anal-fin base length 3.3 to 3.9 in SL; snout length 1.5 to 1.8, horizontal orbital diameter 12.5 to 15.1, least interorbital width 6.2 to 7.5 in HL; and orbital diameter 6.7 to 7.3 in interorbital width. Mouth terminal with dentigerous tooth plates in both premaxilla and dentary. Dorsal fin with I,6, pectoral fin with I,14-15, pelvic fin with I,7 and anal fin with 31-35 rays. Ground color greyish dorsally, whitish ventrally. Orange or yellowish fins ( Graça, Pavanelli, 2007).

Maximum standard length. 332.0 mm ( Graça, Pavanelli, 2007).

Distribution. Widespread in South America rivers.

Remarks. Ageneiosus inermis  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.