21. Molecular evidence suggests that this phylum are derived from the " Lophotrochozoa. 22. Flatworms ( phylum Platyhelminthes ) are the most primitive animals with bilateral symmetry. 23. Their main form of survival is Trans New Guinea phylum of Papuan languages. 24. Members of this phylum were categorized in other phyla. 25. Silicarea is considered the next phylum to diverge from the primary animal lineage. 26. It is classified within the extinct animal phylum Proarticulata. 27. Acoela used to be classified in the phylum Platyhelminthes. 28. Physarum polycephalum belongs to phylum Amoebozoa, infraphylum Mycetozoa, and class Myxogastrea. 29. The Platyzoa include the phylum Platyhelminthes, the flatworms. 30. The relative number of species contributed to the total by each phylum of animals
