BECAS
FEMENIAS martin Miguel
congresos y reuniones científicas
Título:
On the southernmost leiosaurid lizards: phylogeographic and evolutionary patterns of Leiosaurus belli, Diplolaemus bibronii and Diplolaemus darwinii based on the mitochondrial cytochrome b gene
Autor/es:
FEMENIAS, MARTIN MIGUEL; AVILA, LUCIANO JAVIER; SITES, JACK W.; MORANDO, MARIANA
Lugar:
New Orleans
Reunión:
Encuentro; Joint Meeting of Ichthyologist and Herpetologists; 2016
Institución organizadora:
Society for the study of Amphibians and Reptiles; American Society of Ichthyologists and Herpetologists; American Elasmobranch Society; Herpetologists League
Resumen:
The Leiosaurae species Leiosaurus belli, Diplolaemus bibronii and Diplolaemus darwinii are endemic to southern South America and are distributed over diverse habitats in the ecoregions of Monte and Patagonian Steppe. We sampled 124 localities representing all the distributional range of these species, and for 187 individuals we sequenced the mitochondrial gene cyt-b. We analyzed phylogeographic patterns in the light of historical Miocene-to-Pleistocene events of Patagonia. For Leiosaurus belli we inferred 3 allopatric haploclades with uncorrected genetic distances higher than 3%, suggesting that they may be different species. These divergences may have been related to the formation of the Negro, Neuquén and Limay rivers as they have been proposed as gene flow barriers for other lizard species. The northernmost populations show signs of recent expansion. Diplolaemus darwinii and D. bibronii have a southern Patagonia distribution and the latter shows signs of recent population expansion with no apparent role for the Deseado river on their genetic structure. The results of this study, coupled with those of other lizard species from this area, may be useful to define conservation strategies. We suggest a taxonomic review of Leiosaurus belli, including more molecular markers and integrating morphological, ecological and behavioral data.