OPALINIDA

ōˌpəlĭnˈĭdə, phylum of unicellular heterotrophic organisms of the kingdom Protista. The opalinids are all intestinal parasites of small vertebrates, such as frogs, toads, and fish. Opalinid cells are covered with either short, hairlike structures called cilia or with longer flagella. Each organism has at least two nuclei. Their evolutionary lineage is unknown.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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1.
Opalinida
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
OPALINIDA o p lin id , phylum of unicellular heterotrophic organisms of the kingdom Protista . The opalinids are all intestinal parasites...
2.
Protozoan
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...divided into five protist phyla: Mastigophora (the flagellates), Sarcodina (the amebas), Ciliophora (the ciliates), Opalinida , and Sporozoa . Most are motile, and most ingest food, as do animals, rather than produce it themselves, as do plants...


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