Taxonomic studies on Japanese nudibranchs (Molluscs).

日本裸鳃类（软体动物）的分类学研究。

• 批准号: 03640625
• 负责人: HIRANO Yoshiaki
• 金额: $ 0.83万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03640625/
• 关键词: Japan; Nudibranchs; Molluscs; Taxonomy; Variation; Veliger larvae; Biogeography; 色彩変異; ヴェリジャ-幼生; 同胞種

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.

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。分类学工作尤其是对风螺亚目的物种进行了研究。通过对形态变异的分析，发现了一些隐种。该项目揭示的最有趣的方面之一是，隐种经常同域发生，表现出一些不同的生态特征。为了进行进一步的生态学研究，本研究尝试了对原盘幼虫阶段的种类进行鉴定，结果发现了几种新的种类，还发现了许多在日本不为人知的种类。对这些种的分布特征进行了研究，认为人类活动（如航运）可能影响了一些生活史上缺乏长周期的种的扩散，目前正在进行高等分类群系统学的重新评价和系统发生学的回顾研究。在工作完成之前，需要对内部形态进行更仔细的观察。

项目成果

平野 義明: "房総.小湊産後鰓類(2)Dendrodorididae(Nudibranchia)." 千大.生態系研年報. 12. 37-40 (1992)

Yoshiaki Hirano：“Boso。Kominato 产后鳃 (2) Dendrodorididae (Nudibranchia)。仙台生态系统研究所年度报告。”

平野 義明: "Poecilogony of cryptic species?Two geographically differont development patterns observed in Cuthona pupillae(Baba,1961)'(Nudibr anchia:Aeobidacea)." J.Moll.Stud.57. 133-141 (1991)

Yoshiaki Hirano：“神秘物种的起源？在 Cuthona Pullae 中观察到的两种地理上不同的发育模式（Baba，1961）（Nudibr anchia：Aeobidacea）。”133-141（1991）。

平野 義明: "房総小湊産後鰓類(2)Dendvodorididae(Nudibranchia)" 千大・生態系研・年報. 12. 37-40 (1992)

Yoshiaki Hirano：“Boso-Kominato 产后鳃 (2) Dendvodorididae (Nudibranchia)” 仙台生态系统研究所年度报告。 12. 37-40 (1992)。

Hirano, Y.J. & Kuzirian, A.M.: "A new species of Flabellina (Nudibranchia: Aeolidacea) from Oshoro Bay, Japan." Veliger. 34. 48-55 (1991)

平野，Y.J.

平野 弥生: "An earyphagous and a stenophagous aeolid undibranch Species inhabiting together a hydroid Eudendrium boreale." Zoological Science. 8. 1188 (1991)

平野弥生 (Yayoi Hirano)：“一种食耳性和一种窄食性单分支物种，栖息在一种水螅动物中。动物学科学”。