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

通过测定尾索动物线粒体基因组的全序列，结合一级序列和高级信息，分析了尾索动物的遗传进化。我们分析了基于线粒体蛋白质基因序列的尿索动物胚胎发生，包括一个pyrosoma atlanticum。分析表明，海樽纲是肠藻属的一个亚群。Entrogona（Stolidobranchia和Aplousobranchia）似乎是并系群。特别是，Cionidae的Cioninae，Stolidobranchia被认为是Aplousobranchia的姐妹群，Cioninae的Diazoninae被认为是Aplousobranchia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.