…A general term for invertebrates belonging to the phylum Acanthocephala. They parasitize the digestive tracts of vertebrates such as mammals, birds, and fish. There are about 1,000 known species in the world. From 【Pouchworm】…Large, with a body surface similar to that of a stellate worm, it has one or two grape-like clusters at the rear end of its body, which are thought to be a type of sensory organ. Acanthocephala parasitize the digestive tracts of marine, freshwater, and land vertebrates, attaching to the intestinal wall with hooks on the surface of its snout and absorbing nutrients from the host through the body surface. Its body is cylindrical and divided into three parts: snout, neck, and torso. It is called a koutouchu because the snout that protrudes forward is lined with many hooks. … *Some of the terminology that mentions "Acanthocephala" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…鉤頭動物門Acanthocephalaに属する無脊椎動物の総称。哺乳類,鳥,魚など脊椎動物の消化管に内部寄生し,世界で約1000種ほどが知られている。… 【袋形動物】より…大型で体表面が星口動物に似ていて,体後端よりブドウの房のようなものが1~2個あり,これは一種の感覚器と考えられている。 鉤頭虫綱Acanthocephalaは海産,淡水産,陸産の脊椎動物の消化器内に寄生し,吻の表面にあるかぎで腸壁に付着して,宿主の栄養を体表から吸収する。体は円筒形で吻,くび,胴の3部に分けられ,前方に突出する吻に多くのかぎが並んでいるためにコウトウチュウと呼ばれている。… ※「Acanthocephala」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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