A new species of Hisonotus (Siluriformes, Loricariidae) from rio São Francisco basin, Brazil

By

Roxo, Fábio
Costa e Silva, Gabriel de Souza da
Oliveira, Claudio de

Type

Article

Date of Publication

2015

Original Publication

ZooKeys

Volume

498

Pages

127-143

Subjects

Cascudinhos , Fresh-Water , Minas Gerais State , Neotropical fish , Otothyrinae

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.498.6896

 

Abstract

A new species of Hisonotus is described from the rio São Francisco basin. The new species can be distinguished from congeners by having (1) a unique coloration pattern of caudal fin with one black spot extending from its origin to the ventral lobe and two dark spots at the end of the lobe’s rays; (2) odontodes forming longitudinally aligned rows on head and trunk; (3) a functional V-shaped spinelet; (4) a single rostral plate at the tip of the snout; (5) by lacking contrasting dark geometric spots on the anterodorsal region of the body; (6) a lower caudal-peduncle depth; and (7) lower counts of the lateral median plates and (8) higher premaxillary and dentary teeth. The new species is the second described species of the genus Hisonotus in the rio São Francisco basin. It was found inhabiting the marginal vegetation of the rio São Francisco and three of its tributary, rio das Velhas, rio Paraopeba and rio Formoso.