per·i·trich (pĕrʹĭ-trĭk') n. pl. pe·rit·richs, also pe·rit·ri·cha (pə-rĭtʹrĭ-kə)
Any of various protozoans, such as the vorticella, having a wide oral opening surrounded by cilia.
  [From New Latin Peritrichida, former order name : peri- + Greek thrix, trikh-, hair.]

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      any ciliated vase-shaped protozoan of the order Peritrichida (more than 1,000 species), found in both fresh and salt water. Usually nonmotile (sessile), they attach themselves to underwater objects, but a few genera, such as Telotrochidium, are free-swimming. In most peritrichs a posterior disk, the scopula, secretes a contractile stalk for attachment. Some primitive forms, such as the genus Scyphidia, attach directly to an object with the adhesive secreted by the scopula. Peritrichida, lacking uniform ciliation, have conspicuous rows of cilia (short hairlike processes) around the mouth, and there is a posterior ring of cilia in the free-swimming migratory adults and larvae. Reproduction by longitudinal fission differs from the usual ciliate transverse fission. Some sessile genera (for example, Vorticella) are solitary; others (e.g., Zoothamnium) form branching colonies. Peritrichs are coming to serve a useful role in ecological studies as pollution indicators.

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Universalium. 2010.

Look at other dictionaries:

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  • Peritrich — Flagellen oder Geißeln (lat. flagellum Geißel) sind lange, dünne Gebilde bei Lebewesen, die von der Zelloberfläche abstehen und der Bewegung dienen. Sie sind bei Prokaryoten und bei Eukaryoten hinsichtlich Struktur und Funktionsweise… …   Deutsch Wikipedia

  • Peritrich — Taxobox color = khaki name = Peritrichs domain = Eukaryota unranked phylum = Alveolata phylum = Ciliophora classis = Oligohymenophorea subclassis = Peritrichia subclassis authority = Stein 1859 subdivision ranks = Typical orders subdivision =… …   Wikipedia

  • peritrich — noun A ciliate protozoan of the subclass Peritrichia. See Also: spirotrich …   Wiktionary

  • peritrich — pe|ri|trich <Adj.> [zu griech. perí = um herum u. thríx (Gen.: trichós) = Haar] (Med., Biol.): (von Mikroorganismen) auf der ganzen Oberfläche mit Geißeln (2) besetzt …   Universal-Lexikon

  • peritrich — peri·trich per ə .trik n any ciliate of the order Peritricha * * * peri·trich (perґĭ trik) 1. any ciliate protozoan of the subclass Peritrichia. 2. peritrichous …   Medical dictionary

  • peritrich — pe|ri|trich auch: pe|rit|rich 〈Adj.; bei Mikroorganismen〉 auf der Oberfläche mit Geißeln umgeben [Etym.: <peri… + grch. thrix, Gen. trichos »Haar«] …   Lexikalische Deutsches Wörterbuch

  • peritrich — peri|tri̱ch [zu ↑peri... u. gr. ϑριξ, Gen.: τριχος = Haar]: allseitig mit Geißeln versehen (von Mikroorganismen, z. B. Typhusbakterien) …   Das Wörterbuch medizinischer Fachausdrücke

  • peritrich — pe|ri|trich* <zu ↑peri... u. gr. thríx, Gen. trichós »Haar«> auf der ganzen Oberfläche mit Geißeln besetzt (von Mikroorganismen, z. B. Typhusbakterien; Med., Biol.) …   Das große Fremdwörterbuch

  • peritrich — peri·trich …   English syllables

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