Phyla Orthonectida and Dicyemida: Mesozoans

We've arrived at the spiralia phyla orthonectida and dicyemida. The dycemids live exclusively in the renal sac of benthic cephalopods, such as an octopodes. Orthnectids spend most of their lives as trophic plasmodium within the tissue of their host. These phyla have a unique place in the animal kingdom. Spiralia part 7