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Cretaceous Sponges - http://www.cretaceous.de
Documentation and systematic description of fossil Cretaceous sponges (porifera) from the Campanian of Misburg and Höver, Germany. |
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Siphonia - http://www.cretaceous.de/Siphonia.html
Photographs and information on Siphonia subglobosa and Siphonia tubulosa and some photomicrographs showing typical tetraclones and one dermal dichotriaene of Siphonia tubulosa. |
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Sponge Reefs on the Continental Shelf - http://www.pgc.nrcan.gc.ca/marine/9901_home.htm
Canadian Geological Survey program to study hexactinellid reefs. |
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Pemmatites sp. - http://www.lakeneosho.org/Russia/Page20.html
Photographs of several complete fossil sponges. |
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Raphidonema sp. - http://www.soton.ac.uk/~bam2/col-index/fossi-lindex/Sponges/pages/Raphidonema.htm
Photographs of fossil sponges from the Cretaceous. |