hypotrich

hypotrich
—hypotrichous /huy po"tri keuhs/, adj.
/huy"peuh trik/, n.
any ciliate of the suborder Hypotricha, having cilia chiefly on the ventral surface.
[ < NL Hypotricha; see HYPO-, -TRICHA]

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 any dorsoventrally flattened, oval protozoan of the ciliate order Hypotrichida, very widely distributed in both fresh and salt water. Instead of having simple cilia (hairlike processes), the hypotrichs have groups of fused cilia (cirri) arranged on the ventral surface and used for crawling. The dorsal surface is frequently equipped with rows of short, presumably tactile, bristles. Hypotrichs reproduce by sexual conjugation (nuclear exchange) and by asexual binary division. In numerous cases, they encyst. Representative hypotrich genera include the ellipsoid Oxytricha, the freshwater Gonostomum, the sometimes violet or rose-coloured Uroleptus, and, best known of all, Euplotes.

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  • Hypotrich — Taxobox | color = khaki name = Hypotrichs domain = Eukaryota unranked phylum = Alveolata phylum = Ciliophora classis = Spirotrichea subclassis = Hypotrichia subclassis authority = Stein 1859 emend. subdivision ranks = Typical orders subdivision …   Wikipedia

  • hypotrich — noun Any of a group of ciliate protozoa included among the spirotrichs, mostly oval in shape with a rigid pellicle and isolated tufts of cirri on the ventral surface of the cell …   Wiktionary

  • hypotrich — hy·po·trich …   English syllables

  • hypotrich — ˈ ̷ ̷ ̷ ̷+ˌtrik noun ( s) Etymology: New Latin Hypotricha : one of the Hypotricha * * * hypotrichous /huy po tri keuhs/, adj. /huy peuh trik/, n. any ciliate of the suborder Hypotricha, having cilia chiefly on the ventral surface. [ …   Useful english dictionary

  • Spirotrich — Taxobox | color = khaki name = Spirotrichs image caption = Euplotes, a spirotrich domain = Eukaryota unranked phylum = Alveolata phylum = Ciliophora classis = Spirotrichea classis authority = Bütschli 1889 subdivision ranks = Typical sublasses… …   Wikipedia

  • Stichotrich — Taxobox | color = khaki name = Stichotrichs image caption = Stichotrich domain = Eukaryota unranked phylum = Alveolata phylum = Ciliophora classis = Spirotrichea subclassis = Stichotrichia subclassis authority = Small Lynn 1985 subdivision ranks …   Wikipedia

  • Holotrich — Holotrichs are ciliate protozoa that have relatively uniform cilia over their body, and lack or only have a few prominent oral membranelles. Most of the major lines of ciliates are holotrichous. They do not form a natural group, so the term is… …   Wikipedia

  • cirri — (= cirrus (singular ) Large motor organelles of hypotrich ciliates: formed from fused cilia …   Dictionary of molecular biology

  • Euplotes — Genus of free living hypotrich Protozoa. Do not have cilia but may have undulating membranes for propulsion …   Dictionary of molecular biology

  • protozoan — /proh teuh zoh euhn/, n., pl. protozoans, (esp. collectively) protozoa / zoh euh/, adj. Biol. n. 1. any of a diverse group of eukaryotes, of the kingdom Protista, that are primarily unicellular, existing singly or aggregating into colonies, are… …   Universalium

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