Auchenipterus osteomystax (Miranda-Ribeiro, 1918)

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 : 62

Auchenipterus osteomystax (Miranda-Ribeiro, 1918)

Fig. 18

Body elongated; greatest body depth contained 4.0 to 5.9 times in SL; head length 4.5 to 4.8, anal-fin base length 2.2 to 2.5 in SL; snout length 2.3 to 2.6, horizontal orbital diameter 3.2 to 3.5, least interorbital width 2.0 to 2.7 in HL; and orbital diameter 1.7 to 2.3 in interorbital width. Mouth terminal; premaxilla and dentary with several rows of thin teeth. Dorsal fin with 7, pectoral fin with 12 or 13, pelvic fin with 13 or 14 and anal fin with 42-51 rays ( Ferraris, Jr., Vari, 1999). Ground color greyish dorsally, whitish ventrally. Dorsal, pelvic and anal fins hyaline; pectoral and caudal fins with distal margins black ( Graça, Pavanelli, 2007).

Maximum standard length. 285.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río de la Plata, rio Tocantins and lower rio Amazonas basins.

Remarks. Auchenipterus osteomystax is a non-native species from the upper rio Paraná 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.