Ossancora eigenmanni

Ossancora eigenmanni (Boulenger, 1895)

Fig. 20

Body deep; greatest body depth contained 2.8 to 3.8, head length 3.4 to 4.0 times in SL; snout length contained 1.9 to 2.1, horizontal orbital diameter 2.6 to 4.9 and least interorbital width 2.6 to 3.1 times in HL; orbital diameter contained 1.3 to 1.7 times in interorbital width. Mouth terminal; with dentigerous plates in both premaxilla and dentary. Lateral line with 27-30 plates. Dorsal fin with I,6 rays, pectoral fin with I,6-7 rays, pelvic fin with 7 rays and anal fin with 12-15 rays. Ground color brownish; dark-brown spots of varied sizes irregularly distributed. Fins light-brown with dark-brown spots.

Maximum standard length. 125.0 mm.

Distribution. Upper río Paraguay and rio Paraná basins.

Remarks. Ossancora eigenmanni was identified as Oxydoras eigenmanni by Graça, Pavanelli (2007). Birindelli, Sabaj-Pérez (2011), in the description of the new genus, Ossancora, proposed the new combination. Ossancora eigenmanni 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.