Two new species of Pseudancistrus (Siluriformes, Loricariidae) from the Amazon basin, northern Brazil

By

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

Type

Article

Date of Publication

2015

Original Publication

ZooKeys

Volume

482

Pages

21-34

Subjects

Ancistrini , Brazilian shield , freshwater , Neotropical fish , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.482.6909

 

Abstract

Two new species of Pseudancistrus, a genus diagnosed by non-evertible cheek plates and hypertrophied odontodes along the snout margin, are described from two drainages of the Brazilian Shield: P. kayabi from the rio Teles Pires (rio Tapajós basin) and P. asurini from the rio Xingu. The new species are distinguished from congeners (P. barbatus, P. corantijniensis, P. depressus, P. nigrescens, P. reus, and P. zawadzkii) by the coloration pattern. Pseudancistrus kayabi has dark bars on the dorsal and caudal fins which are similar to that of P. reus from the Caroní River, Venezuela. Pseudancistrus asurini is unique among Pseudancistrus in having whitish tips of the dorsal and caudal fins in juveniles to medium-sized adults.