III. Phylum Bryozoa
 

B. Review the common forms of bryozoa:

• Fan (screen like) shape with very small (< 1mm) aperatures
• Twig-like branches with very small (< 1mm) aperatures
• Bulbous or encrusting masses with very small (< 1 mm) aperatures
• Screw-shaped twigs (Archimedes)


C. Look at the following bryozoan links:
 

• bryozoa information from RMIT University in Melbourne Australia
• many color images of living bryozoa, also from RMIT
• images of fossil bryozoa from Spitzbergen, text in Norwegian
• more fossil bryozoa from NMITA, University of Iowa

These specimens are from Phylum Bryozoa (always colonial, tiny openings with no septa), Class Stenolaemata, Order Trepostomata. Box 11: Prasopora.
 
 

Question 8: Draw Prasopora (box 11) and label an autopore (use a hand lens). What type of growth form does this bryozoan have? encrusting = attached to substrate frondose = broad, flat branches massive = hemispherical or subglobular ramose = rounded branches  retriculate = fan-shaped

E. Look at the specimens from boxes 12 and 13:

These specimens are from Phylum Bryozoa (always colonial, tiny modules with no septa), Class Stenolaemata, Order Cryptostomata. Box 11: Archimedes; Box 12:Fennestella.
 
 
 
 

Question 9: What are the differences between autopores (look at diagrams and box 11) and fenestrules (box 12)? You may need to use a hand lens.

 

You are now finished with Part III of the lab. Choose Part I, Part II, or Part IV from the choices listed below, if you have not yet completed these sections.

• Evolution & the History of Life course home page
• Geology Home Page
• Lab 5: Colonial Invertebrates
• Lab 5: Part I Porifera (Sponges)
• Lab 5: Part II Cnidaria (Corals)
• Lab 5: Part IV Unknowns (do this part last)

Last updated on February 24, 1997-jlc.