title: Description of a new species of Pareiorhina (Siluriformes: Loricariidae) from the rio São Francisco basin, Brazil.
abstract: In the present paper we describe a new species of Pareiorhina from Minas Gerais State, Brazil. The new species is distinguished from its congeners by a combination of the following characters: the dorsal surface of caudal peduncle strongly concave, 30 vertebrae, bicuspid teeth, a conspicuous cylindrical shaped papilla between the oral valve and premaxilla, smaller odontodes along the snout margin, a small orbital diameter, a higher head width, a shorter interorbital width, a shorter predorsal length, a shorter cleithral width, and a shorter caudal peduncle depth. The new species is known from four small streams of the rio São Francisco basin: one tributary of the rio Maranhão, one tributary of the rio Paraopeba and two tributaries of the Rio das Velhas. This species is found in fast-flowing streams associated with rocks and sand in the bottom of the rivers.
authors.affiliation: Universidade Estadual Paulista, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, municipality of Botucatu, São Paulo State, 18618-970, Brazil.; Email: gabriel_biota@hotmail.com.
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, municipality of Botucatu, São Paulo State, 18618-970, Brazil.; Email: roxoff@hotmail.com.br.
authors.forename: Fábio F
authors.initials: FF
authors.lastname: Roxo
authors.affiliation: Museu de Zoologia da Universidade de São Paulo, Fish Section, municipality of São Paulo, São Paulo State, 04218-970, Brazil.; Email: oyakawa@usp.br.
authors.forename: Osvaldo T
authors.initials: OT
authors.lastname: Oyakawa
mesh_terms: D063147:Animal Distribution; D000818:Animals; D001938:Brazil; D002397:Catfishes / Q000033:anatomy & histology* / Q000145:classification* / Q000502:physiology; D005260:Female; D008297:Male; D025341:Principal Component Analysis; D012737:Sex Factors; D013045:Species Specificity