Synonym: Coelomopora.
Clades
Echinodermata: 20,000 species.
Hemichordata: 71 species.
ZoologyEchinodermata are sea stars, sea urchins, brittle stars, sea cucumbers, feather stars, sea lilies.
Hemichordata are acorn worms,
Pterobranchia, and possibly graptolites.