Hypostomus hermanni (Ihering, 1905)

Fig. 23

Body deep; greatest body depth contained 4.0 to 5.3 and caudal peduncle depth 8.9 to 9.0 times in SL; head length 2.8 to 3.1, predorsal distance 2.3 to 2.5, dorsal-fin spine length 3.1 to 4.4, pectoral-fin spine length 2.9 to 3.5, adipose-fin spine length 9.3 to 16.9 and caudal peduncle length 2.9 to 3.6 in SL; snout length 1.5 to 1.8, horizontal orbital diameter 3.9 to 5.0 and least interorbital width 2.7 to 3.5 in HL. Mouth inferior; premaxilla with 29-35 and dentary with 30-47 teeth. Mid-lateral series with 25-27 plates, predorsal series with 3 plates, and dorsal-fin base series with 8 or 9 plates. Dorsal fin with I,7, pectoral fin with I,6, pelvic fin with i,5 and anal fin with 5 rays. Ground color brown; body and fins with dark-brown blotches; no blotches on ventral surface.

Maximum standard length. 170.0 mm.

Distribution. Upper rio Paraná basin.