IUCN threat status:

Not evaluated

Comprehensive Description

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Description of Hymenostomatia

Oligohymenophoran ciliates, usually holotrichous; somatic kinetome has preoral suture, but no postoral one; somatic kinetids mostly monokinetids with dikinetids only at anterior tip of body; paroral dikinetid has only b segment, which may be unciliated and reduced; stomatogenesis usually begins near the equator next to a postoral kinety; mucocysts; polymorphic like cycles common; most are freshwater with conspicuous contractile vacuole pore and cytoproct; life cycle may be complex; some transform from microstome to macrostome as bacterial food supply is exhausted.

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