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Colony encrusting, unilaminar to multilaminar and nodular, or erect, branching, often robust. Autozooids with umbonuloid frontal shield bordered by marginal areolae. Primary orifice with or without a lyrula; condyles variably developed. Oral spines present or absent. Avicularia adventitious, often polymorphic, usually suboral. Peristome often well developed. Ovicell prominent, imperforate, or with few pores.

(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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