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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Description of a new catfish genus (Siluriformes, Loricariidae) from the Tocantins River basin in central Brazil, with comments on the historical zoogeography of the new taxon

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Author(s):
Silva, Gabriel S. C. [1] ; Roxo, Fabio F. [1] ; Ochoa, Luz E. [1] ; Oliveira, Claudio [1]
Total Authors: 4
Affiliation:
[1] UNESP, IBB, Dept Morfol, Lab Biol & Genet Peixes, Campus Botucatu, BR-18618970 Botucatu, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ZOOKEYS; n. 598, p. 129-157, 2016.
Web of Science Citations: 8
Abstract

This study presents the description of a new genus of the catfish subfamily Neoplecostominae from the Tocantins River basin. It can be distinguished from other neoplecostomine genera by the presence of (1) three hypertrophied bicuspid odontodes on the lateral portion of the body (character apparently present in mature males); (2) a large area without odontodes around the snout; (3) a post-dorsal ridge on the caudal peduncle; (4) a straight tooth series in the dentary and premaxillary rows; (5) the absence of abdominal plates; (6) a conspicuous series of enlarged papillae just posterior to the dentary teeth; and (7) caudal peduncle ellipsoid in cross section. We used maximum likelihood and Bayesian methods to estimate a timecalibrated tree with the published data on 116 loricariid species using one nuclear and three mitochondrial genes, and we used parametric biogeographic analyses (DEC and DECj models) to estimate ancestral geographic ranges and to infer the colonization routes of the new genus and the other neoplecostomines in the Tocantins River and the hydrographic systems of southeastern Brazil. Our phylogenetic results indicate that the new genus and species is a sister taxon of all the other members of the Neoplecostominae, originating during the Eocene at 47.5 Mya (32.7-64.5 Mya 95% HPD). The present distribution of the new genus and other neoplecostomines may be the result of a historical connection between the drainage basins of the Paraguay and Parana rivers and the Amazon basin, mainly through headwater captures. (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 type: Scholarships in Brazil - Post-Doctorate
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 type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/06853-8 - Phylogenetic analysis of the relationships and diversification patterns of Trichomycteridae (Teleostei, Siluriformes) using DNA sequences
Grantee:Luz Eneida Ochoa Orrego
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/00691-9 - Harnessing phylogenomic comparative methods to understand the diversification of fishes of the Loricarioidea superfamily
Grantee:Fábio Fernandes Roxo
Support type: Scholarships abroad - Research Internship - Post-doctor