Diagonella Sponge Fossils Death Assemblage

Description: Diagonella belongs to the family Protospongiidae, which was a group of early and primitive sponges of the Class Hexactinellida. Diagonella was attached to the sea floor by long spines at the base of the sponge. These spines are rarely preserved. The six-rayed spicules were not fused into a net, so were relatively fragile as a result. These sponges are very rare in the Burgess Shale of British Columbia, and sponges are relatively uncommon in the fossil record owing to their delicacy. This example shows OVER TWENTY specimens most in lateral view.