Trichomycterus puriventris (Teleostei: Siluriformes: Trichomycteridae), a new species of catfish from the rio Paraíba do Sul basin, southeastern Brazil

Abstract

Trichomycterus puriventris, new species is described from the upper Paraíba do Sul river basin, southeastern Brazil. It differs from all species of the genus by the unique colour pattern consisting of dark pigmentation concentrated along and above midline of flank, but absent below midline. The new species is similar to T. alternatus, T. caudofasciatus, T. longibarbatus, and T. pantherinus by all possessing a long pectoral-fin filament. The new species differs from the above species by the presence of anteriormost section of infraorbital canal, number of pleural ribs, pelvic-fin insertion, dorsal and anal-fins origin, size of nasal barbel, depth and width of the body, and length of the head.