Cretaceous Sponges - Documentation and systematic description of fossil Cretaceous sponges (porifera) from the Campanian of Misburg and Höver, Germany. Pemmatites sp. - Photographs of several complete fossil sponges. Brachiospongia - Photograph of this fossil sponge from the Ordovician in Kentucky. Choia utahensis - Fossil sponges from the Cambrian in Utah showing the spicules of which the skeleton is composed. Uphantaenia chemungensis - Image of part of a sponge from the Devonian in New York. Siphonia - Photographs and information on Siphonia subglobosa and Siphonia tubulosa and some photomicrographs showing typical tetraclones and one dermal dichotriaene of Siphonia tubulosa.