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

Author(s)

Silva, Gabriel S. C. ; Roxo, Fabio F. ; Oliveira, Claudio

• Document type: Journal article
• Source: ZOOKEYS; v. N/A, n. 482, p. 14-pg., 2015-01-01.

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 Tapajos 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 Caroni River, Venezuela. Pseudancistrus asurini is unique among Pseudancistrus in having whitish tips of the dorsal and caudal fins in juveniles to medium-sized adults. (AU)

• FAPESP's process: 14/05051-5 - Harnessing phylogenomic comparative methods to understand the diversification of fishes of the superfamily Loricarioidea
• Grantee: Fábio Fernandes Roxo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 12/01622-2 - Analyses of the relationships among the members of the tribe Ancistrini (Siluriformes: Loricariidae) based on DNA sequences
• Grantee: GABRIEL DE SOUZA DA COSTA E SILVA
• Support Opportunities: Scholarships in Brazil - Doctorate