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Fossil Demospongia

Published online by Cambridge University Press:  19 July 2017

J. Keith Rigby
J. Keith Rigby*
Affiliation:
Department of Geology, Brigham Young University, Provo, Utah 84602
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Extract

Demospongia have persisted as a major class of sponges since inception of the record of the phylum in the Cambrian. The class includes about 95% of all sponges in modern seas and all of the known freshwater forms, as well. These sponges occupy environments that range from warm, shallow subtidal, high energy to quiet, cold oceanic deeps. Demosponges range from exposed tide pool forms to cryptic dwellers and include the only boring sponges.

Type
Research Article
Information
Series in Geology, Notes for Short Course , Volume 7: Sponges and Spongiomorphs , 1983 , pp. 12 - 39
Copyright
Copyright © 1983 University of Tennessee, Knoxville 

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