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

Ageneiosus inermis (Linnaeus, 1766)

Fig. 18

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.

Figures

Fig. 18. a. Amaralia oviraptor, NUP 124, 87.1 mm SL, Itaipu Reservoir, Marechal Cândido Rondon, State of Paraná. b. Ageneiosus inermis, NUP 3161, 212.0 mm SL, male, baia Sinhá Mariana, Barão de Melgaço, State of Mato Grosso. c. Ageneiosus militaris, NUP 537, 202.0 mm SL, male, rio Ivinheima, Taquarussu, State of Mato Grosso do Sul. d. Ageneiosus ucayalensis, NUP 533, 290.0 mm SL, male, rio Iguatemi, Mundo Novo, State of Mato Grosso do Sul. e. Auchenipterus osteomystax, NUP 2627, 191.0 mm SL, male, Itaipu Reservoir, Stanta Helena, State of Paraná. f. Parauchenipterus galeatus, NUP 3302, 165.0 mm SL, ressaco do Pau Veio (ilha Porto Rico), Porto Rico, State of Paraná. g. Tatia neivai, 60.0 mm SL, male, uncat. h. Trachelyopterus sp., NUP 1885, 98.2 mm SL, rio Iguatemi, Mundo Novo, State of Mato Grosso do Sul.