SPP 1174: Deep Metazoan Phylogeny

优先方案结合了资源和专门知识，以澄清大型后生动物分类群系统发展的重要方面，并推断分子进化过程和表型的历史进化过程。焦点是传统上被归类为门的动物类群之间的系统发育关系。过去基于形态或分子数据或两者结合的出版物非常不一致，部分原因是数据质量没有得到评估，部分原因是进化过程没有得到很好的理解。例如，蜕皮虫假说将线虫和节肢动物结合在一个单一的分支中，这与由环节动物和节肢动物组成的关节纲相矛盾。第一种主要是基于未发表的信噪比的分子数据，第二种是基于形态观察。目前，这些矛盾令生物学家感到不安，他们的研究依赖于正确的系统发生学、教师和教科书的作者。

The Priority Programme combines resources and expertise to clarify important aspects of the phylogeny of large metazoan taxa and to infer processes of molecular evolution and of the historical evolution of phenotypes. In focus are the phylogenetic relationships between animal taxa traditionally classified as phyla . Past publications based on morphological or molecular data or combining both are extremely inconsistent, partly because data quality was not evaluated, partly because processes of evolution are not well understood. The Ecdysozoa hypothesis, for example, combines nematods and arthropods in a single clade, contradicting the Articulata , a clade composed of annelids and arthropods. The first is mainly supported by molecular data of unpublished signal to noise ratio, the second is based on morphological observations. The contradictions are currently unsettling biologists whose research depends on correct phylogenies, teachers, authors of textbooks.