A remarkable new record of congrid eel Blachea xenobranchialis Karrer and Smith, 1980 (Pisces: Anguilliformes) from Taiwan

Abstract

本文紀錄一尾採自台灣海域的新紀錄種奇鰓鰻(Blachea xenobranchialis Karrer andSmith, 1980)，同時亦為本屬及本種在西北太平洋的新記錄。本文提供該種詳細描述及彩色圖片。我們的標本與奇鰓鰻之模式標本相近，除了有較多的背鰭及臀鰭鰭條、較短的肛門前長及軀幹長、較寬的眼間距、較窄之眼眶後距離以及較小之鰓裂，這些差異有可能是個體間的變異，本文並討論之。A specimen of Blachea xenobranchialis Karrer and Smith, 1980 newly collected from Taiwan water represents the first record of the species, as well the genus, in the northwestern Pacific Ocean. A detail description and the color photos are provided. Our specimen agrees with the type series of B. xenobranchialis, except for the greater dorsal- and anal- fin rays, a relatively small preanal and trunk length, a relatively wider interorbital space, a relatively narrow postorbital space, and a relatively small gill opening. These differences may attribute to the individual variations, which are discussed.