臺灣新記錄種海洋性裸鰓類動物－－大西洋海神海蛞蝓在小琉球潮間帶的出現

First Record of Pelagic Aeolid Nudibranch Glaucus atlanticus Forster, 1777 (Gastropoda: Glaucidae) in the Intertidal Zone of SiaoLiouciou off Southwestern Taiwan Island

大西洋海神海蛞蝓（Glaucus atlanticus Forster，1777）是一種原分布於全球熱帶至溫帶海域漂浮的海洋性裸鰓類動物，是臺灣的新紀錄物種，首次在臺灣的琉球嶼潮間帶出現。有關本種與同屬近似種間之形態差異、地理分布和出現的環境條件，將在本文中加以討論。

Glaucus atlanticus Forster, 1777, a pelagic aeolid nudibranch which has been found in temperate and tropical oceans throughout the world, is reported herein as a newly recorded species to inhabit the intertidal zone of SiaoLiouciou, Taiwan. The morphological differences to its related congeneric species, its geographical distribution as well as the environmental conditions of its occurrence are discussed.