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，提出了一个新的分类群--Lophotrochozoa，其中包括许多主要的海洋无脊椎动物类群，如环节动物纲、软体动物纲和Lopophorata(又名)。Tentaculata)。然而，该分类单元的实际分类单元组成仍未确定，因此，该分类单元内的关系还不清楚。因此，这里提出的项目的目的是确定哪些分类群属于有节线虫，以及它们之间的相互关系。此外，传统上由Clitellata和Polychaeta组成的环节动物分类群具有特殊的意义。几十年来，将不同的海洋分类群合并到这个分类群中的问题一直被讨论得更加激烈。特别是，包括Echiura和Siboglinidae(又名)。Pogonophora和Vstientifera)，基于分子和形态数据的证据正在增加。另一方面，关于Sipuncula、Myzostomida和Kamtrozoa相对于环节动物门的位置仍有争议。因此，为了解决和检验关于钩端螺旋体，特别是环节动物的不同假说，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。这将使我们能够第一次在Lophotrochozoa内进行多种基因分析。

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.