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General Description

Bryozoans in this family may form unilaminar encrusting colonies, or erect colonies which may be unilaminar or multilaminar. Zooids have a well developed section of calcification on the frontal surface (the gymnocyst), which comprises one-third to one-half of the total zooid length and may be porous. Species lack avicularia, vibracular and broad-chambers,Bryozoans in this family may form unilaminar encrusting colonies, or erect colonies which may be unilaminar or multilaminar. Zooids have a well developed section of calcification on the frontal surface (the gymnocyst), which comprises one-third to one-half of the total zooid length and may be porous. The cryptocyst is present, but typically reduced and spines are a feature of some species. Species lack avicularia, vibracular and broad-chambers.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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