Key to 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:

  Class Stenolaemata: Order Cyclostomata and Class Gymnolaemata: Order Cheilostomata
  Class Gymnolaemata:  Order Ctenostomata

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