Testing the new animal phylogeny: A phylum level molecular analysis of the animal kingdom
Testing the new animal phylogeny: A phylum level molecular analysis of the animal kingdom
复制标题
DOI：
10.1016/j.ympev.2008.07.008
复制
发表时间：
2008-10-01
影响因子：
4.1
通讯作者：
Telford, Maximilian J.
中科院分区：
文献类型：
--
作者：
Bourlat, Sarah J.;Nielsen, Claus;Telford, Maximilian J.
几年前从核糖体基因推断的新的动物胚胎发生学促使了传统的基于形态学的后生动物树的一些根本性的重排。两个主要的两侧分支，Deuterostomia和Protostomia，找到了强有力的支持，但原口动物由两个姐妹群，Ecdysozoa和Lophotrochozoa组成，在基于形态的树中看不到。虽然被广泛接受，但并非所有最近的分子系统发育分析都支持新动物系统发育的三分结构。此外，即使基于小核糖体亚基（SSU）的系统发育是正确的，但组成这棵树的三个分支的门之间的关系也缺乏令人沮丧的解决方案。为了解决这个问题，我们已经组装了一个数据集，包括大量的比对序列的位置，以及广泛的采样后生动物phyla.Our数据集包括核糖体和线粒体基因的序列数据，结合新的数据，从蛋白质编码基因（5139个氨基酸和3524个核苷酸的位置，总）从37个代表性的后生动物类群采样。我们的数据表明，强有力的支持的基本结构，新的动物生殖系统，以及为颚，包括多足动物。我们还提供了一些决议内的Lophotrochozoa，在那里我们确认支持单系分支Echiura，星虫和环节动物和令人惊讶的证据腕足动物和纽形动物之间的密切关系。(C)2008年爱思唯尔公司All rights reserved.
The new animal phylogeny inferred from ribosomal genes some years ago has prompted a number of radical rearrangements of the traditional, morphology based metazoan tree. The two main bilaterian clades, Deuterostomia and Protostomia, find strong support, but the protostomes consist of two sister groups, Ecdysozoa and Lophotrochozoa, not seen in morphology based trees. Although widely accepted, not all recent molecular phylogenetic analyses have supported the tripartite structure of the new animal phylogeny. Furthermore, even if the small ribosomal subunit (SSU) based phylogeny is correct, there is a frustrating lack of resolution of relationships between the phyla that make up the three clades of this tree. To address this issue, we have assembled a dataset including a large number of aligned sequence positions as well as a broad sampling of metazoan phyla.Our dataset consists of sequence data from ribosomal and mitochondrial genes combined with new data from protein coding genes (5139 amino acid and 3524 nucleotide positions in total) from 37 representative taxa sampled across the Metazoa. Our data show strong support for the basic structure of the new animal phylogeny as well as for the Mandibulata including Myriapoda. We also provide some resolution within the Lophotrochozoa, where we confirm support for a monophyletic clade of Echiura, Sipuncula and Annelida and surprising evidence of a close relationship between Brachiopoda and Nemertea. (C) 2008 Elsevier Inc. All rights reserved.