Taxonomy, skull diversity and evolution in a species complex of Myotis (Chiroptera: Vespertilionidae): a geometric morphometric appraisal
Taxonomy, skull diversity and evolution in a species complex of Myotis (Chiroptera: Vespertilionidae): a geometric morphometric appraisal
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DOI：
10.1111/j.1095-8312.2008.01076.x
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发表时间：
2008-11-01
影响因子：
1.9
通讯作者：
Pons, Jean-Marc
中科院分区：
文献类型：
--
作者：
Evin, Allowen;Baylac, Michel;Pons, Jean-Marc
分类群之间的系统发育关系不一定反映了形态数据，由于广泛的同质性和趋同。然而，结合形态学和分子数据提供了深入了解生物形式的演变和所涉及的潜在因素。在这里，我们专注于一个复杂的三个分类群的蝙蝠不清楚的分类亲和力：鼠耳蝠，鼠耳蝠blythii和鼠耳蝠punicus。传统的形态测量方法未能将它们分开，而最近基于分子的研究表明，它们构成了不同的生物物种。在本研究中，基于地标的几何形态测量方法已被用来分析头骨的变异218标本属于这个物种复杂。大小和形状的模式界定了三个形态组是一致的，与拟议的分类分配，因此支持所有三个主要群体的物种等级。然而，这些形态计量学结果表明，M。鼠耳蝠M.在喙部和颅骨后部，红尾猴与红尾猴有着共同的形态特征，与红尾猴不同。blythii。由于先前的分子系统发育分析表明M.鼠耳蝠M. blythii是姐妹种，我们解释了M.鼠耳蝠M.可能与它们相似的食性有关。在M. punicus，科西嘉和撒丁岛人群的头骨显着不同于马格里布的，这表明存在进一步的神秘的分类多样性。(c)2008 The Linnean Society of伦敦敦，Biological Journal of the Linnean Society，2008，95，529-538.
Phylogenetic relationships between taxa are not necessarily reflected by morphological data due to widespread homoplasy and convergence. However, combining morphological and molecular data provides insights into the evolution of biological forms and into the potential factors involved. Here we focus on a complex of three taxa of bats with unclear taxonomic affinities: Myotis myotis, Myotis blythii and Myotis punicus. Traditional morphometric methods failed to separate them, whereas recent molecular-based studies suggested that they constitute separate biological species. In the present study, landmark-based geometric morphometrics methods have been used to analyse the skull variability of 218 specimens belonging to this species complex. Patterns of size and shape delimitate three morphological groups that are congruent with the proposed taxonomic assignments, and therefore support species rank for all three major groups. These morphometrics results, however, suggest that M. myotis and M. punicus share shape characteristics in the rostrum and in the posterior part of the skull that differ from M. blythii. Because previous molecular phylogenetic analyses suggested that M. myotis and M. blythii are sister species, we interpret the similitude in skull morphology between M. myotis and M. punicus as a convergence probably related to their similar feeding habits. Within the taxon M. punicus, the skull of Corsican and Sardinian populations significantly differs from that of Maghrebian ones, suggesting the existence of further cryptic taxonomic diversity. (c) 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95, 529-538.