metazoans Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758 [stem] Phylum †Procoelomata Bergström, 1989 [paraphyletic] 1 Class †Machaeridia Withers, 1926 2 ?Class Caudofoveata Boettger, 1956 - caudofoveatans