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首页> 美国卫生研究院文献>Frontiers in Zoology >Combining morphological and genomic evidence to resolve species diversity and study speciation processes of the Pallenopsis patagonica (Pycnogonida) species complex
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Combining morphological and genomic evidence to resolve species diversity and study speciation processes of the Pallenopsis patagonica (Pycnogonida) species complex

机译：结合形态学和基因组学证据解决物种多样性并研究Palenopsis patagonica（Pycnogonida）物种复合体的物种形成过程

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摘要

BackgroundPallenopsis patagonica (Hoek, 1881) is a morphologically and genetically variable sea spider species whose taxonomic classification is challenging. Currently, it is considered as a species complex including several genetic lineages, many of which have not been formally described as species. Members of this species complex occur on the Patagonian and Antarctic continental shelves as well as around sub-Antarctic islands. These habitats have been strongly influenced by historical large-scale glaciations and previous studies suggested that communities were limited to very few refugia during glacial maxima. Therefore, allopatric speciation in these independent refugia is regarded as a common mechanism leading to high biodiversity of marine benthic taxa in the high-latitude Southern Hemisphere. However, other mechanisms such as ecological speciation have rarely been considered or tested. Therefore, we conducted an integrative morphological and genetic study on the P. patagonica species complex to i) resolve species diversity using a target hybrid enrichment approach to obtain multiple genomic markers, ii) find morphological characters and analyze morphometric measurements to distinguish species, and iii) investigate the speciation processes that led to multiple lineages within the species complex.
机译：背景Pallenopsis patagonica（Hoek，1881）是一种形态和遗传可变的海蜘蛛，其分类学分类具有挑战性。当前，它被认为是包括多个遗传谱系的物种复合体，其中许多尚未正式描述为物种。该物种群的成员出现在巴塔哥尼亚和南极大陆架以及南极分岛周围。这些生境已受到历史性大型冰川的强烈影响，以前的研究表明，在冰川最大时期，群落仅限于很少的避难所。因此，这些独立避难所中的异源物种形成被认为是导致高纬度南半球海洋底栖生物群生物多样性较高的常见机制。但是，很少考虑或测试其他机制，例如生态物种形成。因此，我们对P. patagonica物种复合体进行了综合的形态学和遗传学研究，以：i）使用目标杂交富集方法解析物种多样性以获得多个基因组标记，ii）查找形态特征并分析形态计量以区分物种，并且iii ）研究导致物种复合体中多个血统的物种形成过程。

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