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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 Bucephalus polymorphus ： ウィキペディア英語版 Bucephalus polymorphus ''Bucephalus polymorphus'' is a flatworm. This species is within the Bucephalidae family of Digenea, which in turn is a subclass of Trematodes within the phylum Platyhelminthes (i.e. flatworm). It is characterized by having a mouth near the middle of its body, along with a sac-like gut. The mouth opening is located in the centre of the ventral surface. The adults occur in the gut of marine and fresh-water fish. The metacercariae encyst in smaller fish, sometimes in the nervous system. These parasitic flatworms are dorso-ventrally flattened animals〔http://parasitology.informatik.uni-wuerzburg.de/login/n/h/1111.html〕 characterized by a bilaterally symmetrical body enclosed within a syncytial tegument. They have a distal, anucleate later (distal cytoplasm). The distal cytoplasm contains vesicular inclusions that are Golgi derived.〔G. Schmidt and L. Roberts: Foundations of Parasitology (Seventh Ed.) McGraw-Hill. New York, NY, 2005.〕 The adults of these acoelomate worms are common in the digestive tract, but are also found in other organs of vertebrates. The adult parasite attaches via a characteristic anterior adhesive organ with tentacles.〔Yamaguti, S.: Synopsis of digenetic trematodes of vertebrates Keigaku Publishing Company. Tokyo, 1971.〕 Bucephalus are native to North American fresh waters that parasitize freshwater bivalves.〔Malloy et al.: "Survey of the Parasites of Zebra Mussels (Bivalvia: Dreissenidae) in Northwestern Russia, with Comments on Records of Parasitism in Europe and North America." J. Helminthol. Soc. Wash. 63(2), 1996, pp. 251-256〕 ==Taxonomy== The genus ''Bucephalus'' was based on this species, which was the earliest known, initially described by Baer (1827) from its cercaria. Von Siebold (1848) believed that the adult bucephalid he named ''Gasterostomum fimbriatum'' represented an adult form of the same bucephalid, but this identity has never been proven.〔 〕 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「Bucephalus polymorphus」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.