Pleuronematina

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Pleuronematina (class Ciliatea, order Hymenostomatida) A suborder of ciliate protozoa in which body cilia usually are spares. Usually there is a single, prominent, caudal cilium. A conspicuous row of oral cilia, constituting an ‘undulating membrane’, extends from one side of the cell. Pleuronematina are found in marine or freshwater aquatic environments.