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Major Subgroups of Bryozoa

 

Class: Stenolaemata

 

Geological Range: Ordovician - Recent

 

Description: Calcified marine bryozoans. Cylindrical zooids, which continue to grow throughout the life of the colony. Tentacle extrusion in living forms is brought about by muscular action forcing fluid into the basal part of the zooid, displacing the tentacles out of the orifice.

 

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Author: Luke Mander
Last updated: 20.11.05
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Websites produced by students on the MSc Palaeobiology programme in the Department of Earth Sciences at the University of Bristol for academic year 2005-6