Taxonomy, phylogeny, and co-evolution of dicyemids

研究了双叶纲中生动物的分类、系统发育和共同进化。(1)分类学：在头足类章鱼hubbsorum、O.longispadiceus、sepiia lorigera、Sepioteuthis australis和sepioloidea lineolata 5种中发现了10个双叶纲新种。(2)双叶纲的细胞分化：利用全座原位杂交技术分析了16个基因的表达模式，为进一步了解功能分化提供依据。在蚓形幼虫期和虫形幼虫期，细胞之间可能存在一些功能差异。(3)双足动物和plachozoans线粒体基因组：对双足动物和plachozoans线粒体基因组进行了研究，在双足动物线粒体中发现了几个小环状dna，揭示了plachoans的全线粒体基因组。(4)双足类与头足类的关系：双足类与宿主头足类的系统发育树显示双足类与头足类并非共同进化。一些双尾纲物种转换了宿主物种，一些与宿主头足类共种。

Dicyemid mesozoans were studied on taxonomy, phylogeny, and co-evolution.(1) Taxonomy: Ten new species of dicyemids were found in five species of cephalopods,Octopus hubbsorum, O.longispadiceus,Sepia lorigera,Sepioteuthis australis, andSepioloidea lineolata(2): Cell differentiationin dicyemids: To provide insight into the functional differentiation, using whole mount in situ hybridization the expression patterns of 16 genes were analyzed. Some possible functional differences among cells were found in vermiform stages and infusoriform larvae.(3) Mitochondrial genomes of dicyemids and plachozoans: Mitochondrial genomes of dicyemids and plachozoans were studied, several mini-circle DNAs were found in dicyemid mitochondria, and the wholemitochondrial genome of plachozoans was revealed.(4) Relationship between dicyemids and cephalopods: The phylogenetic trees of dicyemid species and the host cephalopods revealed that dicyemids and cephalopods did not co-evolved. Some dicyemid species switchedthe host species, some co-speciated with the host cephalopods.