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DNA Barcoding of the reptiles of the Socotra Archipelago

AuthorsMontero-Mendieta, Santiago; Vasconcelos, Raquel; Simó-Riudalbas, Marc; Sindaco, Roberto; Santos, Xavier; Fasola, Mauro; Razzetti, Edoardo; Llorente, Gustavo A.; Carranza, Salvador CSIC ORCID
Issue DateOct-2014
CitationXV Jornades Herpetològiques Catalanes (2014)
AbstractA decade ago, DNA barcoding was proposed as a fast, cost-efficient and simple taxonomic method based on the use of a unique, short and standardized gene region for identifying existing species and speeding the discovery of new ones. However, due to technical problems, few DNA barcoding studies in squamate reptiles have been conducted so far. In this work, using three sets of primers, we successfully DNA barcoded 380 individuals of all presently recognized species of reptiles in the Socotra Archipelago (31 species, 12 genera), classified as a UNESCO World Heritage Site. Although no barcoding gap exists in the whole dataset, specimen identification success rate of DNA barcoding is moderate to high (68-94%) based on distance-based and tree-based techniques. The low levels of inter-specific genetic divergence observed between some species are consistent with paraphyly of Pristurus sokotranus. On the other hand, the high levels of intra-specific variability found within some species suggest cryptic diversity. Depending on the species delimitation approaches, between 4 and 37 more species than those presently recognized should be taken into account for future conservation efforts. Through this study we conclude that DNA barcoding is very useful for specimen identification, but for species discovery and description it will only be effective if incorporated into a more integrative taxonomic framework.
DescriptionTrabajo presentado en las XV Jornades Herpetològiques Catalanes, celebradas en Sant Feliu de Codines del 10 al 12 de octubre de 2012.
Appears in Collections:(IBE) Comunicaciones congresos
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