Oligotrichida

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Oligotrichida

[¦äl·ə·gō′trik·ə·də]
(invertebrate zoology)
A minor order of the Spirotrichia; the body is round in cross section, and the adoral zone of membranelles is often highly developed at the oral end of the organism.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Extremely high copy numbers and polymorphisms of the rDNA operon estimated from single cell analysis of oligotrich and peritrich ciliates.
Sequences analyses of the small subunit rRNA gene confirm of oligotrich ciliates sensu lato and support the monophyly of the subclasses Oligotrichia and Choreotrichia (Ciliophora, Spirotrichea).
and Keratella cochlearis, a cyclopoid copepod Tropocyclops sp., a cladoceran Bosmina longirostris, an Oligotrich protozoan, and the midge larva Chaoborus americanus.
Jumping behavior in the oligotrich ciliates Strobilidium velox and Halteria grandinella and its significance as a defense against rotifer predators.
Considering the seasonal variations, the protozoan groups that are truly planktonic, such as the oligotrichs (Spirotrichea), predominated in the dry season, whereas during the rainy season, due to the material input and resuspension of sediment, sessile protozoans of the Peritrichia group were the most important ones.
Considerando-se as variacoes sazonais, os grupos de protozoarios que sao verdadeiramente planctonicos, como os oligotrichs (Spirotrichea), predominaram no periodo seco, enquanto que, no periodo chuvoso, em razao da entrada de material e da ressuspensao do sedimento, os protozoarios sesseis do grupo Peritrichia foram os mais importantes.
Hino T, Kametaka M, Kandtsu M (1973) The cultivation of rumen oligotrich protozoa.
For example, Jack and Gilbert (1993) found maximum growth rates of 0.87 per day for the oligotrich ciliate Strobilidium gyrans (Stokes, 1887), and 0.86 per day for Euplotes eurystomus (Wrzesniowski, 1870) feeding on a cryptomonad algae at a temperature of 20 [degrees]C.
Throughout the study, ciliate communities in all lakes were numerically dominated by oligotrichs. Average total abundance during 1990-1994 ranged from 80 to 90% in the reference lake (Paul) and from 57 to 85%, 61 to 89%, and 57 to 85% in the experimental lakes (East Long, West Long, and Peter, respectively).
Researchers at the Woods Hole (Mas.) Oceanographic Institution report in the April 23 NATURE that many plankton called oligotrichs and tintinnids can retain chloroplasts they ingest and use them to their own advantage.