翻訳と辞書 Words near each other ・ Litoria purpureolata ・ Litoria rubrops ・ Litoria singadanae ・ Litoria spartacus ・ Litoria spinifera ・ Litoria wapogaensis ・ Litoria wilcoxii ・ Litorius ・ Litorânea ・ Litos ・ Litosanthes ・ Litoscelis ・ Litosphingia ・ Litosphingia corticea ・ Litosphingia minettii ・ Litostomatea ・ Litostroj ・ Litostroma ・ Litostrov ・ Litotenes ・ Litotes ・ Litothallus ・ Litothamnus ・ Litovany ・ Litovel ・ Litovelské Pomoraví Protected Landscape Area ・ Litovoi ・ Litovyshche ・ Litoxetine ・ Litozamia Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Litostomatea ： ウィキペディア英語版 Litostomatea The Litostomatea are a class of ciliate protists. Until recently, the class Litostomatea was divided into two groups, the Haptoria and the Trichostomatia. However, new genetic information has resulted in the resurrection of a third subclass, Rhynchostomatia, first proposed by A. W. Jankowski in 1980. The Haptoria includes mostly carnivorous forms, for instance ''Didinium'', a species of which preys primarily on the ciliate ''Paramecium''. The Trichostomatia (trichostomes) are mostly endosymbionts in the digestive tracts of vertebrates. These include the species ''Balantidium coli'', which is the only ciliate parasitic in humans. The Rhynchostomatia include two free-living genera previously included among the Haptoria, but now discovered to be genetically distinct from them, the Dileptida and the Tracheliida. The body cilia arise from monokinetids, which have an ultrastructural arrangement characteristic to the group. The mouth is apical or subapical. In trichostomes it lies in a depression, or vestibule, containing modified somatic cilia. In one order, the Entodiniomorphida, the cilia are arranged into tufts or bands, and may be packed together to form syncilia, resembling the membranelles and cirri of spirotrichs (with which they were originally classified) and other ciliates. However, no true compound cilia occur. In haptorians the mouth is typically surrounded by a ring of coronal cilia, arising from dikinetids derived from the anterior of the body kineties, and a ring of characteristic extrusomes called ''toxicysts''. These discharge on contact with prey, penetrating and immobilizing them, and beginning digestion. In some forms the mouth is formed only during feeding, and everts to assist in capture. The cytopharynx takes the form of a straight tube, supported by rods or ''nematodesmata'', which dilates greatly during ingestion. This structure is called a ''rhabdos'', and is functionally and structurally distinct from the ''cyrtos'' found in several other classes. ==References== *(【引用サイトリンク】work=NCBI Taxonomy Browser ) 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「Litostomatea」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.