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Embryological study of scolopendromorph centipedes : A comparative embryological analysis on the affinity of myriapods and chelicerates

蜈蚣的胚胎学研究:多足类与螯类亲和力的比较胚胎学分析

基本信息

批准号：
15570071
负责人：
MACHIDA Ryuichiro
金额：
$ 2.37万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

In the animal phylogeny, one of the most interesting and attractive issues is the reconstruction of the groundplan and evolution of the Arthropod, which are the phylum largest in species number in animals. "Myriapoda" not only share many ancestral features in arthropods, but also their intragroup affinities have not been settled yet. Hence, it is the most significant for the reconstruction of the groundplan and evolution of arthropods to elucidate the myriapods in groundplan and morphogenesis.In the present study, the developmental process of Scolopocryptops rubiginosus L.Koch of Chilopoda, which are affiliated to the most basal clade in the myriapods, was examined and described in detail, the embryonic development being divided into nine stages and the postembryonic ones up to the third instar larva into five stages. The observations were argued in light of morphology and evolution.It was revealed that Chilopoda share the embryological plans with Chelicerata in many aspects, this being the first morphological contribution referring to the close resemblances good enough to postulate their affinity. It was also argued that Chilopoda represent the most basal dade with in Arthropod, to reconstruct the groundplan of Arthropoda.The knowledge obtained has been published in some papers, including a comprehensive article to be submitted to Journal of Morphology. In the course of the present study, I had conducted some embryological studies on insects as well, this being useful in extending the discussion in the present study.

在动物系统发育学中，最有趣和最具吸引力的问题之一是节肢动物的平面图和进化的重建，节肢动物是动物中物种数量最多的门。 “多足纲”不仅具有节肢动物的许多祖先特征，而且它们的类群内亲缘关系尚未确定。因此，阐明多足动物的地平面和形态发生对于重建节肢动物的地平面和进化具有重要意义。胚后至三龄幼虫分为五个阶段。这些观察结果从形态和进化的角度进行了争论。结果表明，唇足类在许多方面与螯肢动物具有相同的胚胎学计划，这是第一个形态学贡献，指的是足够接近的相似性足以假定它们的亲和力。也有人认为Chilopoda代表了节肢动物中最基础的Dade，以重建节肢动物的平面图。所获得的知识已发表在一些论文中，其中包括一篇将提交给Journal of Morphology的综合文章。在本研究的过程中，我也对昆虫进行了一些胚胎学研究，这有助于扩展本研究的讨论。