Vertebrate Zoology 63(1): 3-8, doi:
A new Nematocharax species from the middle Contas River basin, Northeastern Brazil (Characiformes: Characidae)
expand article infoPedro Henrique Negreiros De Bragança, Maria Anaïs Barbosa, José Leonardo Oliveira Mattos‡
‡ UFRJ - Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil

Corresponding author: José Leonardo Mattos ( jlomattos@gmail.com )

© Pedro Henrique Negreiros De Bragança, Maria Barbosa, José Leonardo Mattos.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: De Bragança PHN, Barbosa MA, Mattos JLO (2013) A new Nematocharax species from the middle Contas River basin, Northeastern Brazil (Characiformes: Characidae). Vertebrate Zoology 63(1): 3-8
Open Access
Abstract
Nematocharax costai, new species is described from the Contas river basin, northeastern Brazil. The new species is included in the genus Nematocharax by possessing elongated branched dorsal-, anal- and pelvic-fin rays; two rows of pre-maxillary teeth in adults and practically complete row of teeth along the free ventral maxillary border. It differs from N. venustus, unique congener, by the number of maxillary teeth in adult males; absence of hooks and spinules on dorsal and pelvic fins; reduced number of anal-fin rays with spinules; presence of a long dark pink horizontal mark on caudal peduncle; number of supraneurals and pelvic-fin filament yellow.
Keywords
Characidae, Neotropical, Northeastern Brazil, Systematics, Taxonomy