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）形态学的密切观察。对紫叶菊亚目的种类进行了分类研究。通过对形态变异的仔细分析，发现了一些隐种。该项目揭示的一个最有趣的方面是，隐种经常出现在共地，表现出一些不同的生态特征。为了开展进一步的生态工作，我们尝试了在pediveliger阶段的物种鉴定，并对一些物种进行了鉴定。除了几个新种外，还发现了许多在日本不为人所知的物种。对这些物种的分布特征进行了研究，认为人类活动（如航运）可能影响了一些在其生活史中缺乏长浮游阶段的物种的分散。高等分类群系统分类学的重新评价和系统发育的回顾研究正在进行中。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.