Hypostomus ternetzi (Boulenger, 1895)

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

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https://doi.org/ 10.1590/1982-0224-20170094



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Hypostomus ternetzi (Boulenger, 1895)


Hypostomus ternetzi (Boulenger, 1895)

Fig. 24 View Fig

Body deep; greatest body depth contained 4.2 to 4.7 and caudal peduncle depth 7.6 to 8.2 times in SL; head length 2.8 to 3.0, predorsal distance 2.2 to 2.4, dorsal-fin spine length 2.6 to 3.5, pectoral-fin spine length 3.0 to 3.3, adipose-fin spine length 9.2 to 10.3 and caudal peduncle length 3.1 to 3.3 in SL; snout length 1.6 to 1.8, horizontal orbital diameter 6.3 to 6.5 and least interorbital width 2.6 to 3.1 in HL. Mouth inferior; premaxilla with 59-127 and dentary with 60-126 teeth. Mid-lateral series with 25-27, predorsal series with 3 or 4, and dorsal-fin base series with 8 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal fin with 6 rays. Ground color light-beige, with dark-brown spots and/ or dark-brown vermiculate pattern, slightly conspicuous. Brown fins, sometimes with dark-brown spots.

Maximum standard length. 296.0 mm ( Graça, Pavanelli, 2007).

Distribution. Río Paraguay, middle río Paraná and río Uruguay basins.

Remarks. Hypostomus ternetzi 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.