Torres-Carvajal Omar, Lobos Simón E, Venegas Pablo J
Museo de Zoología, Escuela de Biología, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre y Roca, Apartado 17-01-2184, Quito, Ecuador.
Museo de Zoología, Escuela de Biología, Pontificia Universidad Católica del Ecuador, Avenida 12 de Octubre y Roca, Apartado 17-01-2184, Quito, Ecuador.
Mol Phylogenet Evol. 2015 Dec;93:281-8. doi: 10.1016/j.ympev.2015.07.025. Epub 2015 Aug 7.
Among Neotropical lizards, the geographically widespread gymnophthalmid Cercosaura as currently defined includes lowland and highland taxa from Panama to Argentina, with some species occurring in the northern Andes. In this study we analyze three mitochondrial (12S, 16S, ND4) and one nuclear (c-mos) gene using Bayesian methods to clarify the phylogenetic relationships among most species of Cercosaura based on a well-supported phylogenetic hypothesis that also includes a large sample of other taxa within Cercosaurini. The phylogenetic tree obtained in this paper shows that Cercosaura as currently defined is not monophyletic. Two species from the northern Andes (C. dicra and C. vertebralis) are nested within Pholidobolus, which has been formerly recognized as a major radiation along the Andes of Ecuador and Colombia. Therefore, Cercosaura has probably not diversified in the northern Andes, although the phylogenetic position of C. hypnoides from the Andes of Colombia remains unknown. Tree topology and genetic distances support both recognition of C. ocellata bassleri as a distinct species, C. bassleri, and recognition of C. argula and C. oshaughnessyi as two different species. In the interest of promoting clarity and precision regarding the names of clades of gymnophthalmid lizards, we propose a phylogenetic definition of Cercosaura.
在新热带界蜥蜴中，目前所定义的分布广泛的裸眼蜥科（Gymnophthalmidae）的圆尾蜥属（Cercosaura）包括从巴拿马到阿根廷的低地和高地类群，一些物种分布在安第斯山脉北部。在本研究中，我们使用贝叶斯方法分析了三个线粒体基因（12S、16S、ND4）和一个核基因（c-mos），以基于一个得到充分支持的系统发育假说，阐明圆尾蜥属大多数物种之间的系统发育关系，该假说还包括圆尾蜥族（Cercosaurini）内其他类群的大量样本。本文获得的系统发育树表明，目前所定义的圆尾蜥属并非单系类群。来自安第斯山脉北部的两个物种（C. dicra和C. vertebralis）嵌套在鳞蜥属（Pholidobolus）中，鳞蜥属以前被认为是沿着厄瓜多尔和哥伦比亚安第斯山脉的一个主要辐射类群。因此，圆尾蜥属可能并未在安第斯山脉北部发生分化，尽管来自哥伦比亚安第斯山脉的C. hypnoides的系统发育位置仍然未知。树形拓扑结构和遗传距离支持将巴氏圆尾蜥（C. ocellata bassleri）认定为一个独特物种，即巴氏圆尾蜥（C. bassleri），并支持将阿根廷圆尾蜥（C. argula）和奥氏圆尾蜥（C. oshaughnessyi）认定为两个不同物种。为了提高裸眼蜥科蜥蜴类群名称的清晰度和准确性，我们提出了圆尾蜥属的系统发育定义。
