Hidden diversity within the lizard genus Liolaemus: Genetic vs morphological divergence in the L. rothi complex (Squamata:Liolaeminae).
Hidden diversity within the lizard genus Liolaemus: Genetic vs morphological divergence in the L. rothi complex (Squamata:Liolaeminae).
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DOI：
10.1016/j.ympev.2016.09.009
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发表时间：
2017-02
影响因子：
4.1
通讯作者：
M. Olave;L. Avila;J. Sites;M. Morando
中科院分区：
文献类型：
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作者：
M. Olave;L. Avila;J. Sites;M. Morando
目前，Liolaemusis是世界上物种第二丰富的爬行动物属（257种），对其实际多样性的预测表明，它可能是最多样化的属。最初，Liolaemusspecies被描述为分布广泛且形态多变的分类群，但在以前未开发的地理区域进行大量采样，加上分子和更广泛的形态学研究，发现了意想不到的大量以前未被发现的物种。在这里，我们研究了theL中分子和形态差异的水平。该研究结合了97个个体的14个位点（2个线粒体位点和12个核位点）以及形态学数据（9个形态测量变量和15个颜色模式变量），代表了所有6个已描述的theL物种。罗斯科复合体，加上两个候选物种。我们使用多聚结物种划分程序iBPP，解决了分子分化的强烈差异；每个物种被推断为一个独立的谱系，由高后验概率支持。然而，形态差异并不是那么明显，我们对形态特征的建模表明，不同的选择压力意味着某种程度的形态停滞。我们讨论了自然选择对表型性状的作用，这可能是“隐藏”属真正多样性的重要因素。
Currently,Liolaemusis the second most species-rich reptile genus in the world (257 species), and predictions of its real diversity suggest that it may be the most diverse genus. Originally,Liolaemusspecies were described as widely distributed and morphologically variable taxa, but extensive sampling in previously unexplored geographic areas, coupled with molecular and more extensive morphological studies, have discovered an unexpectedly high number of previously undetected species.Here, we study the level of molecular vs. morphological divergence within theL. rothicomplex, combining a total of 14 loci (2 mitochondrial and 12 nuclear loci) for 97 individuals, as well as morphological data (nine morphometric and 15 color pattern variables), that represent all six described species of theL. rothicomplex, plus two candidate species. We use the multi-coalescent species delimitation program iBPP and resolve strong differences in molecular divergence; and each species is inferred as an independent lineage supported by high posterior probabilities. However, morphological differences are not that clear, and our modeling of morphological characters suggests differential selection pressures implying some level of morphological stasis. We discuss the role of natural selection on phenotypic traits, which may be an important factor in “hiding” the real diversity of the genus.