The sexual signals of speciation? a new sexually dimorphic phymaturus species of the patagonicus clade from patagonia Argentina

Scolaro, J. Alejandro, Jara, Manuel and Pincheira-Donoso, Daniel (2013) The sexual signals of speciation? a new sexually dimorphic phymaturus species of the patagonicus clade from patagonia Argentina. Zootaxa, 3722 (3). pp. 317-332. ISSN 1175-5326

Full content URL: http://dx.doi.org/10.11646/zootaxa.3722.3.2

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Item Type:Article
Item Status:Live Archive

Abstract

Evolution is a multivariate process which, therefore, is expected to leave multiple recognizable signals after episodes of speciation. These signals express in the genome regardless of the mechanism driving speciation, and in a few or in multiple phenotypic traits when divergent selection has been implicated. In lineages that have undergone adaptive radiations (i.e. speciation accompanied by ecological diversification), the phenotypic signals of speciation can be substantially pro-nounced. In contrast, within non-adaptive radiations (i.e. lineage diversification with minimal ecological diversification linked to allopatric or parapatric species distributions), phenotypic signals of speciation can be minimal. The South Amer-ican lizard genus Phymaturus is regarded as a candidate non-adaptive radiation given the tendency for non-overlapping distributions among its phenotypically and ecologically similar (i.e. niche conservatism) species. Thus, limited phenotypic divergence has evolved among closely related species. Within the patagonicus clade of the genus, sexual monochroma-tism is highly conserved, while sexual dichromatism is rare, and mostly negligible when observed. In this paper, we pro-vide the description of a new sexually dimorphic and dichromatic species of this clade (Phymaturus camilae sp. nov.). This species is substantially isolated spatially and phylogenetically separated from P. ceii, P. delheyi and P. zapalensis, the most sexually dichromatic members of the clade. In addition, the new taxon was recently identified as a 'candidate new species' based on molecular (nuclear) phylogenetic evidence. © 2013 Magnolia Press.

Keywords:Sexual dimorphism, Non-adaptive radiation, Lizards, Phymaturus, Liolaemidae, Patagonia
Subjects:D Veterinary Sciences, Agriculture and related subjects > D300 Animal Science
Divisions:College of Science > School of Life Sciences
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ID Code:13747
Deposited On:07 Apr 2014 14:44

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