Please use this identifier to cite or link to this item:
metadata.dc.type: Artigo de Periódico
Issue Date: 2008
metadata.dc.creator: RIBEIRO, Daniel Toffoli
HRBEK, Tomas
ARAÚJO, Maria Lúcia Góes de
ALMEIDA, Mauricio Pinto de
FARIAS, Izeni Pires
Title: A test of the utility of DNA barcoding in the radiation of the freshwater stingray genus Potamotrygon (Potamotrygonidae, Myliobatiformes)
Citation: RIBEIRO, Daniel Toffoli et al. A test of the utility of DNA barcoding in the radiation of the freshwater stingray genus Potamotrygon (Potamotrygonidae, Myliobatiformes). Genetics and Molecular Biology, São Paulo, v. 31, n. 1, p. 324-336, 2008. Disponível em: <>. Acesso em: 14 set. 2015. <>.
Abstract: DNA barcoding is a recently proposed global standard in taxonomy based on DNA sequences. The two main goals of DNA barcoding methodology are assignment of specimens to a species and discovery of new species. There are two main underlying assumptions: i) reciprocal monophyly of species, and ii) intraspecific divergence is always less than interspecific divergence. Here we present a phylogenetic analysis of the family Potamotrygonidae based on mitochondrial cytochrome c oxidase I gene, sampling 10 out of the 18 to 20 valid species including two non-described species. Potamotrygonidae systematics is still not fully resolved with several still-to-be-described species while some other species are difficult to delimit due to overlap in morphological characters and because of sharing a complex color patterns. Our results suggest that the family passed through a process of rapid speciation and that the species Potamotrygon motoro, P. scobina, and P. orbignyi share haplotypes extensively. Our results suggest that systems of identification of specimens based on DNA sequences, together with morphological and/or ecological characters, can aid taxonomic studies, but delimitation of new species based on threshold values of genetic distances are overly simplistic and misleading.
Keywords: Peixe
Código de barra do DNA taxonômico
DNA mitocondrial
Amazônia brasileira
ISSN: 1678-4685
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - ICB

Files in This Item:
File Description SizeFormat 
Artigo_TestUtilityDna.pdf324,66 kBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons