From the far reaches of Patagonia: new phylogenetic analyses and description of two new species of the Liolaemus fitzingerii clade (Iguania: Liolaemidae)

Cristian Simón Abdala, Juan Manuel Díaz Gómez, Viviana Isabel Juarez Heredia

Abstract


Within the Liolaemus boulengeri group or ‘patch’ group, there is a monophyletic clade named Liolaemus fitzingerii group.This clade is composed of large Liolaemus individuals, mostly psammophilus, oviparous and mainly insectivorous, dis-tributed from central Río Negro and Neuquén to the south of Santa Cruz in Argentine Patagonia. We make a taxonomicand phylogenetic revision of the L. fitzingerii clade, describe two new species of the group, compare these results withphylogenetic hypotheses from the literature, and discuss the geographic distribution of species of the L. fitzingerii clade.The new species described here inhabit central and central-eastern Chubut Province, Argentina. These new species areeasily distinguished from the other species of the L. fitzingerii group by a combination of morphological characters. Thephylogenetic analyses support the description of these new species, because they are not closely related to the species withwhich they were previously confused. According to a new phylogenetic analysis of the L. fitzingerii clade, one of the newspecies, L. camarones sp. nov., has a relatively basal position within the group, whereas the other new species, L. shehuensp. nov., is sister taxon of L. chehuachekenk. With these two new species, the L. fitzingerii clade is now composed of nine species, all of which are distributed in Argentine Patagonia.

Keywords


Phylogeny; Taxonomy; <i>Liolaemus</i>; Chubut; Argentina.

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ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand