ISBN: | 978-5-5124-0009-8 |
High Quality Content by WIKIPEDIA articles! Halichondrites elissa (sometimes mis-spelt Halicondrites) is a monospecific genus of sponge known from the Middle Cambrian Burgess Shale. 7 specimens of Halichondrites are known from the Greater Phyllopod bed, where they comprise 0.1% of the community.