title: Description of a new species ofParotocinclus(Siluriformes, Hypoptopomatinae) from the rio Tapajós basin.
abstract: A new species ofParotocinclusis described from three small tributaries of the rio Tapajós basin, Mato Grosso State, Brazil. The new species can be distinguished from its congeners by presenting the following characters: (1) a triangular dark blotch at the anterior base of the dorsal fin, (2) the absence of an adipose fin but presence of one small platelet at typical adipose-fin region, (3) the abdomen completely covered by dermal plates, (4) a pectoral girdle totally exposed, (5) a single series of bicuspid teeth, and (6) the higher number of bicuspid premaxillary and dentary teeth.
authors.affiliation: Universidade Estadual Paulista, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, R. Prof. Dr. Antônio Celso Wagner Zanin, 250, Rubião Júnior, 18618-689, Botucatu, São Paulo State, Brazil.
authors.forename: Fábio F
authors.initials: FF
authors.lastname: Roxo
authors.affiliation: Universidade Estadual Paulista, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, R. Prof. Dr. Antônio Celso Wagner Zanin, 250, Rubião Júnior, 18618-689, Botucatu, São Paulo State, Brazil.
authors.forename: Gabriel S C
authors.initials: GS
authors.lastname: Silva
authors.affiliation: Universidade Estadual Paulista, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, R. Prof. Dr. Antônio Celso Wagner Zanin, 250, Rubião Júnior, 18618-689, Botucatu, São Paulo State, Brazil.
authors.forename: Claudio
authors.initials: C
authors.lastname: Oliveira
keywords: Biodiversity; Cascudinhos; Neotropical fish; freshwater; taxonomy