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Bryozoans in this family form erect or encrusting colonies. Frontal wall well developed umbonuloid. Primary orifice without a sinus, uncalcified; obscured by calcified peristome and secondary orifice. Marginal areola present. Frontal spiramina evanescent or permanent, single or multiple. Avicularia usually present.

(Hayward and Ryland, 1999)


Creative Commons Attribution 3.0 (CC BY 3.0)

© Sally Rouse

Source: Bryozoa of the British Isles

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