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 Ancistrus sp. Fig. 23 Body deep; greatest body depth contained 3.0 to 4.0 and caudal peduncle depth 6.0 to 7.0 times in SL; head length 2.6 to 2.8, predorsal distance 2.1 to 2.2, dorsal-fin spine length 4.1 to 4.4, pectoral-fin spine length 2.9 to 3.4 and caudal peduncle length 3.5 to 3.8 in SL; snout length 1.2 to 1.4, horizontal orbital diameter 7.9 to 8.3 and least interorbital width 2.0 to 2.4 in HL. Mouth inferior; premaxilla with 8-15 and dentary with 10-16 teeth. Midlateral series with 25, predorsal series with 4, and dorsalfin base series with 12 plates. Dorsal fin with I,7-9, pectoral fin with I,6, pelvic fin with i,5 and anal fin with 6 rays. Ground color brown; light-beige rounded blotches on body, especially on head. Hyaline fins with dark-grey blotches. Maximum standard length. 140.0 mm ( Graça, Pavanelli, 2007 ). Distribution. Rio São Francisco Verdadeiro, upper rio Paraná basin.