Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated Author Ota, Renata Rúbia Author Deprá, Gabriel de Carvalho Author Graça, Weferson Júnio da Author Pavanelli, Carla Simone text Neotropical Ichthyology 2018 2018-06-11 16 2 1 111 journal article 10.1590/1982-0224-20170094 f68fe85c-2a4c-4625-b684-74f61398d6c2 1982-0224 3678395 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.