If you have Kimberella as a Mollusk, and Arkarua as a echinoderm
> (assuming these are valid),*Parvancorina* has been suggested to be an arthropod, because it looks like a trilobite larva (only bigger).
The Cambrian palaeoscolecids have been suggested to be ecdysozoans, related in particular to priapulids and panarthropods.