New insights into diversity and evolution of deep-sea Mytilidae (Mollusca: Bivalvia)
New insights into diversity and evolution of deep-sea Mytilidae (Mollusca: Bivalvia)
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DOI：
10.1016/j.ympev.2010.05.027
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发表时间：
2010-10-01
影响因子：
4.1
通讯作者：
Samadi, Sarah
中科院分区：
文献类型：
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作者：
Lorion, Julien;Buge, Barbara;Samadi, Sarah
贝类一直被用作生物模型，以更好地了解与深海热液喷口和冷渗漏有关的动物群的进化起源。然而，到目前为止，大多数研究都对喷口和渗漏物种有强烈的偏向，主要是因为缺乏对有机瀑布中密切相关的物种的了解。在这里，我们使用来自西南太平洋的两个基因和一个大的分类群样本来重新评估深海贻贝的物种多样性。这一新的分类框架为它们的进化史的系统发育研究奠定了基础。我们首先强调了一种意想不到的异位模式，并提出通常从有机瀑布报道的贻贝实际上在环境方面的专业化程度很差。这对为解释集团多样化而提出的适应性情景提出了挑战。其次，我们确认深海贻贝起源于有机瀑布，然后在多个事件中定居在热液喷口和冷渗漏。总体而言，这项研究为进一步进行系统发育调查和对深海贻贝进行全球系统修订奠定了新的基础。(C)2010 Elsevier Inc.保留所有权利。
Bathymodiolinae mussels have been used as a biological model to better understand the evolutionary origin of faunas associated with deep-sea hydrothermal vents and cold seeps. Most studies to date, however, have sampled with a strong bias towards vent and seep species, mainly because of a lack of knowledge of closely related species from organic falls. Here we reassess the species diversity of deep-sea mussels using two genes and a large taxon sample from the South-Western Pacific. This new taxonomic framework serves as a basis for a phylogenetic investigation of their evolutionary history. We first highlight an unexpected allopatric pattern and suggest that mussels usually reported from organic falls are in fact poorly specialized with regard to their environment. This challenges the adaptive scenarios proposed to explain the diversification of the group. Second, we confirm that deep-sea mussels arose from organic falls and then colonized hydrothermal vents and cold seeps in multiple events. Overall, this study constitutes a new basis for further phylogenetic investigations and a global systematic revision of deep-sea mussels. (C) 2010 Elsevier Inc. All rights reserved.