INVESTIGADORES
AVILA luciano Javier
congresos y reuniones científicas
Título:
Molecular phylogeny of the kriegi complex (Iguania: Liolaemini)
Autor/es:
MEDINA, C.D.; AVILA, L.J.; SITES, J.W., JR.; MORANDO, M.
Lugar:
Vancouver
Reunión:
Congreso; VII World Congress of Herpetology; 2012
Institución organizadora:
World Congress of Herpetology
Resumen:
The widely-distributed lizard genus Liolaemus has the largest number of species in southern South America (~ 235), Within Liolaemus two major groups of species are recognized: Liolaemus and Eulaemus , and within Liolaemus sensu stricto , one of the several recognized clades is the L. elongatus-kriegi complex. . The kriegi-complex can be defined on the basis of several diagnostic morphological characters, including large and stout bodies, and many shared features of color and scalation. All are saxicolous and viviparous, and prefer damp environments in basaltic habitats. Latitudinally, the complex extends from 37±S, near ?El Planchón?, the type locality of L. buergeri (VII administrative region, Chile), to the southern distributional limit at the northern edge of Chubut province at 42±S. Originally, the kriegi complex included three described species based on morphological characters, L. buergeri , L. kriegi y L. ceii , but more recent molecular (mitochondrial) studies revealed four candidate species in this complex (Morando et al., 2003). In this study we test the hypotheses of Morando et al. (2003) with an expanded molecular data set that includes six nuclear and two mitochondrial gene regions (5,202 bp), based on a total of 30 lizards from all the type localities and covering to total geographic distribution of the group. We present a comprehensive assessment of the diversification history of the kriegi-complex in Patagonia Argentina, as inferred from relationships recovered from concatenated sequences using MP, ML, and BI methods. We also reconstructed a species tree incorporating the multispecies coalescent approach as implemented in BEAST, and we estimated divergence times between the main clades of the kriegi complex. The recovered phylogenetic