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Sponges (poriferans) are one of the very oldest animals. They have been noted in the Precambrian and have been present in the fossil record through to the present day.
The collections include hexactinellid (glass) sponges, calcareous sponges and calcified demosponges.
sponge collection: A collection of Cretaceous sponges the work of Bob Perkins.
Learn more about poriferans