Key: Phylum Bryozoa

Taken primarily from Kozloff, 1987, 1996 p. 424 (Copyright 1987, 1996, University of Washington Press. Used in this web page by permission of University of Washington Press)

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1a Zooecia calcified to at least some extent; apertures of zooecia either simple openings or closed by a lidlike operculum, but not closed by a constriction Class Stenolaemata:Order Cyclostomata and
Class Gymnolaemata: Order Cheilostomata

1b Zooecia not calcified, either united into a fleshy, leathery, or gelatinous mass or connected by stolons; apertures of zooecia closed by a constriction Class Gymnolaemata: Order Ctenostomata

Taxonomic Levels Represented in this Key:

Page created by Anna Dyer, 7-2002
Edited by Hans Helmstetler 11-2002, Dave Cowles 2005

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Lower taxonomic level	Main Page	Alphabetic Index	Systematic Index	Glossary

1a	Zooecia calcified to at least some extent; apertures of zooecia either simple openings or closed by a lidlike operculum, but not closed by a constriction	Class Stenolaemata:Order Cyclostomata and Class Gymnolaemata: Order Cheilostomata
1b	Zooecia not calcified, either united into a fleshy, leathery, or gelatinous mass or connected by stolons; apertures of zooecia closed by a constriction	Class Gymnolaemata: Order Ctenostomata