Stibarobdella macrothela (Annelida, Hirudinida, Piscicolidae) from Elasmobranchs in Japanese Waters, with New Host Records

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概要

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• The piscicolid leech Stibarobdella macrothela (Schmarda, 1861) was collected from three elasmobranchs (ornate eagle ray Aetoinylaens vespertilio, banded houndshark Triakis scylliunn, and tiger shark Galeocerdo cuvier) in Japanese waters. The first two species (A. vespertilio and T. scyllium) are new hosts, and G. cuvier is newly recorded as a host in Japan. The external morphology of the smallest leech specimen (total length 16 mm) is figured.アカメウミビルStibarobdella macrothelaは, 汎世界的に分布する海産ヒル類で, 主として板鰓類に寄生する. 本報告では, 三浦半島沿岸(相模湾)で採集されたドチザメTriakis scyllium(ドチザメ科)の尾柄部(腹側), 沖縄島知念村海野漁港で採集されたアオスジトビエイ属の1種Aetomylaeus vespertilio(トビエイ科)の下顎の歯の付け根にある組織, および石垣島沖で採集されたイタチザメGaleocerdo cuvier(メジロザメ科)の口腔内に寄生していたアカメウミビルを記録した. ドチザメとアオスジトビエイ属の1種はアカメウミビルの新宿主記録となり, イタチザメは日本におけるアカメウミビルの新宿主記録となる. これらのうち, アオスジトビエイ属の1種に寄生していた個体は全長16 mmと非常に小型であったため, 外部形態を図示した. 沖縄島と石垣島沖における記録は, 南西諸島におけるアカメウミビルの新記録となる.

• 2008-08-20

著者

• YAMAUCHI Takeo

  Toyama Institute of Health

• OTA Yuzo

  Graduate School of Engineering and Science, University of the Ryukyu

• NAGASAWA Kazuya

  Graduate School of Biosphere Science, Hiroshima University

• Ota Yuzo

  Graduate School Of Engineering And Science University Of The Ryukyu

• Yamauchi Takeo

  Toyama Inst. Health Toyama Jpn

• Nagasawa Kazuya

  Graduate School Of Biosphere Science Hiroshima University

関連論文

• Stibarobdella macrothela (Annelida, Hirudinida, Piscicolidae) from Elasmobranchs in Japanese Waters, with New Host Records
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