Phylactolaemata

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Phylactolaemata (phylum Bryozoa, subphylum Ectoprocta) A class of nonmineralized, freshwater ectoprocts in which the lophophore is U-shaped. The mouth is covered by a lip. The class has a probable Upper Cretaceous representative, but otherwise is known only from the Holocene.

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Phylactolaemata

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