suctorian


suctorian
/suk tawr"ee euhn, -tohr"-/, n.
1. a suctorial animal.
2. a protozoan of the class or order Suctoria, which live, as adults, attached by a stalk to the substrate and feed by means of long, suctorial tentacles.
adj.
3. belonging or pertaining to the Suctoria.
[1835-45; < NL Suctori(a), n. use of neut. pl. of SUCTORIUS sucking ( < L sug(ere) to SUCK + -torius -TORY1) + -AN]

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      any protozoan of the ciliate order Suctorida, which includes both freshwater and saltwater organisms. Suctorians are extremely widely distributed in nature. The young stage is free-swimming; the adult has no body cilia and is generally nonmotile (permanently attached), with tentacles instead of a mouth for feeding. The tentacles may be distributed over the entire body, as in Podophrya, or they may be arranged in discrete areas (e.g., in Ophryodendron they are grouped on the ends of “arms”).

      Adult suctorians attach themselves to an object, generally by means of a noncontractile stalk; they then catch and suck the contents of other ciliates and rotifers with their tentacles. Often the prey becomes paralyzed immediately after capture.

      Suctorians produce young by either internal or external budding; most other ciliates, by contrast, reproduce by binary fission. The sexual process of conjugation (interchange of nuclear substance between individuals) is also common among suctorians. A few genera (e.g., Allantosoma, Endosphaera) are parasitic on protozoans known as peritrichs. Cyathodinium lives in the intestinal tract of guinea pigs.

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Universalium. 2010.

Look at other dictionaries:

  • Suctorian — Suc*to ri*an, n. 1. (Zo[ o]l.) A cartilaginous fish with a mouth adapted for suction, as the lampery. [1913 Webster] 2. (Zo[ o]l.) One of the Suctoria. [1913 Webster] …   The Collaborative International Dictionary of English

  • suctorian — noun Etymology: New Latin Suctoria, from neuter plural of suctorius suctorial Date: circa 1842 any of a class or subclass (Suctoria) of complex protozoans which are ciliated only early in development and in which the mature form is fixed to the… …   New Collegiate Dictionary

  • suctorian — noun A protist of the subclass Suctoria in the class Phyllopharyngea; a predatory sessile ciliate …   Wiktionary

  • suctorian — suc·to·ri·an ē ən n any protozoan of the class Suctoria …   Medical dictionary

  • suctorian — suc·to·ri·an …   English syllables

  • suctorian — suc•to•ri•an [[t]sʌkˈtɔr i ən, ˈtoʊr [/t]] n. 1) bio a suctorial animal 2) mcr a protozoan of the order Suctoria, which in the adult phase attaches to the substrate by a stalk and feeds by means of suctorial tentacles 3) mcr belonging or… …   From formal English to slang

  • suctorian — ˌsəkˈtōrēən noun ( s) Etymology: New Latin Suctoria + English an 1. : a suctorial animal 2. : one of the Suctoria * * * /suk tawr ee euhn, tohr /, n …   Useful english dictionary

  • 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

  • Ciliate — For the type of leaf margin, see Leaf#Margins (edge). Ciliated Cells Temporal range: Ediacaran Recent …   Wikipedia

  • Myzocytosis — (from Greek: myzein, (μυζεῖν) meaning to suck and kytos (κύτος) meaning container , hence referring to cell ) is a method of feeding found in some heterotrophic organisms. It is also called cellular vampirism as the predatory cell pierces the… …   Wikipedia


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