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台灣新紀錄-斑帶圓捲螺Volvatella vigourouxi (Montrouzier, 1861)(後鰓亞綱:囊舌目:圓捲螺科)之形態與行爲描述

A Description of Volvatella vigourouxi (Montrouzier, 1861) (Opisthobranchia: Sacoglossa: Volvatellidae) as a Snail Newly Recorded to Taiwan with Special References to Its Behaviors

摘要


本文報導斑帶圓捲螺Volvatella vigourouxi (Montrouzier, 1861)為台灣軟體動物囊舌目(Sacoglossa)的新紀錄科(圓捲螺科,Volvatellidae)、屬(圓捲螺屬,Volvatella)及種外,並描述斑帶圓捲螺發現之棲地及其形態與攝食、交配、防禦等生態行為。高雄柴山珊瑚礁海岸之斑帶圓捲螺棲息於低潮帶針葉蕨藻Caulerpa sertularioides (Gmelin) Howe,1905的藻叢間,體長介於4.97-9.31 mm間,以針葉蕨藻為食。交配時個體長小於6 mm扮演之角色為雄性,會爬至個體長大於7 mm之雌性背部右側進行交配。當個體受到攻擊時,會分泌出白色黏液,並迅速逃離。

關鍵字

囊舌目 圓捲螺科 新紀錄 行爲 台灣

並列摘要


This paper describes Volvatella vigourouxi (Montrouzier, 1861) (Opisthobranchia: Sacoglossa: Volvatellidae) as a species newly recorded to Taiwan. It was a small snail with body lengths of 4.97 mm to 9.31 mm. It inhabited on coral reefs in the coastal intertidal zone of Chai-shan, Kaohsiung and fed on green algae, Caulerpa sertularioides (Gmelin) Howe, 1905. Although it was a hermaphroditic animal, testes became mature at earlier ages than ovaries, so that the sizes of individuals less than 6 mm were found to be males, and larger than 7 mm were females. In copulation the small male mounted on the top of the large female. When attacked, it secreted white mucus and crawled away.

並列關鍵字

Sacoglossa Volvatellidae new record behavior Taiwan

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