Study on the urochordate(tunicate) evolution based on the diversity of mitochondrial genome structures and molecular phylogenetic analysis based on mitochondrial genes

通过测定尾脊索动物线粒体基因组的全核苷酸序列，基于初级序列和高级信息分析尾脊索动物的系统发育。我们基于线粒体蛋白基因序列分析了尾脊索动物的系统发育，其中包括一种大西洋火虫。分析表明，塔利亚科是entergoona的一个亚群。Entrogona（Stolidobranchia和Aplousobranchia）似乎是副鳃类。其中，滴虫科的滴虫科（Cioninae, Stolidobranchia）可能是滴虫科的姐妹类群，滴虫科的重氮科（Diazoninae）可能是滴虫科的内群。

By determination of complete nucleotide sequences of urochordate mitochondrial genomes, we analyzed urochordate phylogeny based on the primary sequences and higher information. We analyzed urochordate phylogeny based on mitochondrial protein gene sequences including a pyrosomatid Pyrosoma atlanticum. The analysis suggested that the Thaliacea is a subgroup of Enterogona. Entrogona(Stolidobranchia and Aplousobranchia) seems to be paraphyletic group. In particular, Cioninae of Cionidae, Stolidobranchia is suggested to be sister group of Aplousobranchia, and Diazoninae of Cioninae is suggested to be the in-group of Aplousobranchia.