Two new records of Lamniform shark from the waters adjacent to Taiwan

Abstract

本研究記錄臺灣東部海域出現之兩種鼠鯊目軟骨魚類新記錄種，分別是巨口鯊科之巨口鯊Megachasma pelagios Taylor, Compagno & Struhsaker, 1983以及尖吻鯊科之歐氏尖吻鯊Mitsukurina owstoni Jordan, 1898，皆為新記錄科且此兩科均僅有一屬一種，其中巨口鯊出現於花蓮與臺東海域，歐氏尖吻鯊出現於大溪及南方澳海域。本研究除詳細描述並記錄標本之形態特徵，並附上分佈地圖、標本照片以及臺灣海域鼠鯊目之檢索表。The specimens of two new records of lamniform shark (Chondrichthyes: Lamniformes) were collected in the waters off eastern Taiwan. They are Megachasma pelagios Taylor, Compagno & Struhsaker, 1983 (Megachasmidae) and Mitsukurina owstoni Jordan, 1898 (Mitsukurinidae). The monotypic families Megachasmidae and Mitsukurinidae which both have only one species in each family are new records to Taiwan. Megamouth shark, Megachasma pelagios, were collected by trawlers off Hualien County and Taitung County, and goblin shark, Mitsukurina owstoni, were collected by bottom trawlers in the waters off Tashi and Nanfangao harbors. This paper includes diagnostic characters and geographical distributions of the two species. Color photos and a key to the families of the order Lamniformes from Taiwan are given.