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首页> 外文期刊>Marine biology >Phylogenetic relationships within Ovulidae (Gastropoda : Cypraeoidea) based on molecular data from the 16S rRNA gene
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Phylogenetic relationships within Ovulidae (Gastropoda : Cypraeoidea) based on molecular data from the 16S rRNA gene

机译：基于16S rRNA基因的分子数据，夜蛾科（天麻科：Cypraeoidea）内的系统发生关系

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摘要

Closely interacting groups, such as hosts and parasites, sometimes provide useful models to study evolution and adaptive processes. In Ovulidae, a widespread family of specialised browsing carnivorous molluscs that feed on polyps and tissues of Anthozoa, close association with the host has produced a plethora of adaptations affecting shell morphology, colour pattern and mantle shape. These morphological characters have been widely used in ovulid taxonomy, although putative differences are often based on trivial and inconsistent variations. In this work we used a molecular approach to generate the basal phylogeny of the family. Phylogenetic analyses of mitochondrial 16S rRNA gene sequences of 32 species from 23 genera reveal unexpected taxonomic groupings from the genus up to the family level, as well as unexpected phenomena of homoplasy in conchological features. Since molecular phylogenies also provide an evolutionary framework where character transformations are polarised, we used this basal ovulid phylogeny to explore the specificity of the association and the degree of morphological adaptation to the host.
机译：宿主和寄生虫等紧密相互作用的群体有时会提供有用的模型来研究进化和适应性过程。在Ovulidae，一个广泛的以食肉动物的息肉和组织为食的专门浏览肉食性软体动物的家庭，与宿主的紧密联系产生了许多适应症，影响了壳的形态，颜色样式和地幔形状。尽管推定的差异通常基于琐碎且不一致的变异，但这些形态特征已被广泛用于卵巢分类学。在这项工作中，我们使用了分子方法来产生该家族的基础系统发育。对来自23个属的32个物种的线粒体16S rRNA基因序列进行系统进化分析，揭示了从属到家族水平的意料之外的分类学分组，以及意料之外的同质现象。由于分子系统发育还提供了字符转换被极化的进化框架，因此我们使用这种基础卵子系统发育来探索关联的特异性和对宿主的形态适应程度。

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