Phylogenetic position of Annelida and possible subordinatied annelid taxa (e.g. Sipuncula and Myzostomida) within Lophotrochozoa based on molecular data

根据分子数据，提出了一个由环节动物、软体动物和触须动物等主要海洋无脊椎动物组成的新分类群——Lophotrochozoa。然而，该分类群的实际分类群组成仍未确定，因此其内部的关系尚不清楚。因此，本文拟建项目的目的是确定哪些分类群属于Lophotro chozoa，以及它们之间的相互关系。此外，由传统的cliitellata和Polychaeta组成的环节动物分类群也受到了特别的关注。几十年来，在这个分类群中合并不同的海洋分类群的讨论更加激烈。特别是，基于分子和形态学数据的证据越来越多地证明了Echiura和Siboglinidae（又名Pogonophora和Vestimentifera）的纳入。另一方面，单孔虫、密孔虫和Kamptozoa相对于环节动物的地位仍有争议。因此，为了解决和验证关于浮游动物，特别是环节动物的不同假设，需要从EST数据库和选定的蛋白质编码基因中获得分子数据。这将使我们首次能够在光藻中进行多基因分析。

Based on molecular data a new taxon, Lophotrochozoa, was proposed comprising many mainly marine invertebrate taxa such as Annelida, Mollusca and Lophophorata (a.k.a. Tentaculata). However, the actual taxa composition of this taxon is still unresolved and thus the relationships within Lophotrochozoa are not well understood. Therefore, the purpose of the proposed projects herein is to determine, which taxa belong to Lophotro chozoa and how they are interrelated to each other. Furthermore, the taxon Annelida comprising traditionally Clitellata and Polychaeta is of special interest. Since a few decades the incorporation of different marine taxa within this taxon has been discussed more intensely. Especially, for the inclusion of Echiura and Siboglinidae (a.k.a. Pogonophora and Vestimentifera) the evidence is growing based on molecular and morphological data. On the other hand, the position of Sipuncula, Myzostomida and Kamptozoa relative to Annelida is still controversially discussed. Therefore, to address and test the different hypotheses concerning Lophotrochozoa and especially Annelida molecular data shall be gained from both EST databases and selected protein coding genes. This will enable us to perform multiple gene analyses within Lophotrochozoa for the first time.