spirotrich

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spirotrich

(class Spirotrichea), any of a group of ciliated protozoans characterized by nonuniform, sparse ciliation and prominent membranelles of fused cilia around the mouth opening. The subclass contains a number of orders. See heterotrich; hypotrich; odontostome; oligotrich; tintinnid.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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