title: Molecular data indicate the presence of a novel species of Centropomus (Centropomidae - Perciformes) in the Western Atlantic.
abstract: Centropomus undecimalis is distributed in the coastal waters of the western Atlantic between North Carolina and São Paulo, although very little is known of the genetic structure of its populations. Here, 148 C. undecimalis samples were obtained from six sites in the southwestern Atlantic, representing the Brazilian distribution of this species. Segments of three mitochondrial (Cytb, COI and 16S) and one nuclear (IGF1) gene were sequenced. The results of all analyses indicated the presence of a previously undetected lineage of Centropomus in the northern extreme of Brazil (Amapá) in the region of the Oiapoque estuary. This taxon is genetically distinct from all 12 recognized species of Centropomus. The populations from the Brazilian states of Pará, Maranhão, Ceará, Rio Grande do Norte, Rio de Janeiro and São Paulo were genetically similar to C. undecimalis from coastal areas of the Caribbean and USA. Nucleotide divergence between C. undecimalis and the new Oiapoque taxon are greater than or similar to those found between a number of valid Centropomus species. The estimated time of divergence between C. undecimalis and the new taxon is approximately 2 millionyears. The findings of the present study emphasize the need for a thorough taxonomic revision of this genus.
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Joiciane N
authors.initials: JN
authors.lastname: de Oliveira
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Grazielle
authors.initials: G
authors.lastname: Gomes
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Péricles Sena
authors.initials: PS
authors.lastname: do Rêgo
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Sávia
authors.initials: S
authors.lastname: Moreira
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Iracilda
authors.initials: I
authors.lastname: Sampaio
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil.
authors.forename: Horacio
authors.initials: H
authors.lastname: Schneider
authors.affiliation: Laboratório de Genética e Conservação, Instituto de Estudos Costeiros de Bragança, UFPA, Alameda Leandro Ribeiro, SN, Aldeia, Bragança, Pará, Brazil. Electronic address: julianaararipe@yahoo.com.br.
authors.forename: Juliana
authors.initials: J
authors.lastname: Araripe
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D014644:Genetic Variation; D006239:Haplotypes; D010473:Perciformes / Q000235:genetics*; D010802:Phylogeny; D058974:Phylogeography; D017422:Sequence Analysis, DNA
keywords: Common snook; New species; Phylogeography