Sytematics, phylogeney, and evolution of dicyemid mesozoans

(1)新种描述在头足类5种中发现10种双叶纲新种。报道了太平洋俄罗斯章鱼和杜氏肠章鱼的三种双叶门。(2)双叶门的系统发育关系利用间隙连接蛋白Innexin的氨基酸序列研究了双叶门的亲缘关系。双叶门与软体动物和环节动物的亲缘关系比与软体动物的亲缘关系更近。(3)共同进化双足类与宿主头足类的系统发育树显示，双足类与头足类没有共同进化。一些双足类改变宿主物种，一些与宿主头足类共种。

(1) Description of new speciesTen new species of dicyemid were found in five species of cephalopods. Three dicyemid species of Rossia pacifica and enteroctopus dofleini were redscribed.(2) Phylogenetical relationship of dicyemidsThe relationship of dicyemids was studied using the amino acid sequences of the gap junction protein, Innexin. The dicyemid was more closely related to mollusks and annelids than platyhelmintes.(3) CoevolutionThe phylogenetic trees of dicyemid species and the host cephalopods revealed that dicyemids and cephalopods did not co-evolved. Some dicyemid species change the host species, some co-speciated with the host cephalopods.