The centrosome is thought to have evolved only in the metazoan lineage of eukaryotic cells. Collagen IV exists in all metazoan phyla. There is a lot of evidence against ciliates being the metazoan ancestor. In the old view of metazoan phylogeny, the lophophorates were placed within the Deuterostomia. At least 67 metazoan parasite species have been reported from the species. Yet other important classes of water-borne diseases are caused by metazoan parasites. Some metazoan parasites attack "Aurelia aurita", as well as most other species of jellyfish. As well as the fact that exon shuffling became significant after metazoan radiation. It has been the subject of various studies on the evolution of metazoan development. The regeneration of organs is a common and widespread adaptive capability among metazoan creatures. For example, in metazoan cells, the PAR-3/PAR-6/aPKC complex plays a fundamental role in cell polarity. Both GCM1 and FLYWCH belong to families of DNA-binding factors found in metazoan.