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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Irrawaddy river shark ： ウィキペディア英語版 Irrawaddy river shark ''Glyphis siamensis'' (Irrawaddy river shark) is a species of requiem shark, belonging to the family Carcharhinidae, known only from a single museum specimen originally caught at the mouth of the Irrawaddy River in Myanmar. A plain gray, thick-bodied shark with a short rounded snout, tiny eyes, and broad first dorsal fin, the Irrawaddy river shark is difficult to distinguish from other members of its genus without anatomical examination. Virtually nothing is known of its natural history; it is thought to be a fish-eater with a viviparous mode of reproduction. The International Union for Conservation of Nature (IUCN) has assessed this species as Critically Endangered, as its distribution is extremely limited and suffers heavy fishing pressure and habitat degradation. ==Taxonomy== The only known specimen was collected in the 19th century and described as ''Carcharias siamensis'' by Austrian ichthyologist Franz Steindachner, in ''Annalen des Naturhistorischen Museums in Wien'' (volume 11, 1896).〔 However, subsequent authors doubted the validity of this species, regarding it as an abnormal bull shark (''Carcharhinus leucas''), until in 2005 shark systematist Leonard Compagno recognized it as distinct member of the genus ''Glyphis''.〔Martin, R.A. (The Mysterious, Endangered River Sharks (''Glyphis'' spp.) ). ReefQuest Centre for Shark Research. Retrieved on November 11, 2009.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Irrawaddy river shark」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.