Taxonomic studies on Japanese nudibranchs (Molluscs).

在日本各地收集了材料，并对标本进行了外部和内部(生殖系统)形态的密切观察。分类工作取得了很大进展，特别是对风信子亚目的种类进行了研究。通过对形态变异的仔细分析，发现了一些神秘的物种。这个项目揭示的最有趣的方面之一是，神秘的物种经常共生出现，表现出一些不同的生态特征。为了进行进一步的生态学工作，在小儿科阶段进行了物种鉴定，并有可能在几个物种上进行鉴定。除了几个新物种外，通过这个项目还发现了许多在日本还不知道的物种。对这些物种的分布特征进行了研究，认为航运等人类活动可能会影响一些在生活史上缺乏长浮游期的物种的扩散，目前正在进行高等分类群系统学重新评估和系统发育回顾的研究。在完成这项工作之前，有必要对内部形态进行更仔细的观察。

Collections of materials were made at various localities in Japan, and close observations of both external and internal (reproductive systems) morphology were done on the specimens. Taxonomic works were achieved especially on the species of suborder Aeolidacea. By careful analysis of morphological variation, some cryptic species were discovered. One of the most interesting aspects revealed by this project is that the cryptic species often occur sympatrically showing some different ecological features. In order to perform further ecological works, identification of the species in pediveliger stage was attempted, and it became possible in several species.In addition to several new species, many species which had not known in Japan were discovered through this project. Distributional features were studied for these species, and it was suggested that human activities such as shipping may affect the dispersion of some species which lack long planktonic phase in their life history.Studies for re-evaluation of the systematics in higher taxa and review of the phylogeny are now carrying out. More careful observations of the internal morphology are necessary before the completion of the work.