Other members, such as Trematoda and Cestoda, are hermaphroditic parasites.
Recent research has raised the argument that a prominent member of this phylum should actually belong to Lophotrochozoa though the lack of a fossil record, except for the occasional sloth feces, makes any such claim difficult to support. Some members of this phylum have specialized epidermal secretion cells called rhabdites, while Monogenea wield a barbed opisthaptor at their posterior end. Only Turbellaria are free-living examples of this triploblastic phylum, some of which's members contain (*) flame cells in their excretory systems. Other members, such as Trematoda and Cestoda, are hermaphroditic parasites. These organisms lack a coelom and hence must respire by diffusion, requiring them to be flat and resulting in bilateral symmetry. FTP, name this phylum, whose members include Planaria, as well as the flukes and tapeworms, commonly known as the flatworms.
Recent research has raised the argument that a prominent member of this phylum should actually belong to Lophotrochozoa though the lack of a fossil record, except for the occasional sloth feces, makes any such claim difficult to support.
{Platyhelminthes}