Explain the classification of phylum Platy helminthes of non chordates?

It consists of different classes like turbellaria, trematoda and cestoda. Turbellaria are free living flatworms living in aquatic habitat. Their body is unsegmented and has ciliated epidermis. They are also known as stirring organisms. They undergo sexual as well as asexual reproduction. They are hermaphrodite and the regeneration is quite common. On the other hand trematoda are parasitic worms with the absence of epidermis and cilia. The mouth is anterior and they are hermaphrodite. Their body is without segments and has single ovary with the multiple testes. Cestoda are girdle form organisms which are parasitic. They have cuticle covering with the absence of cilia and epidermis. The body is divided into false segments known as proglottids. They generally have two hosts. They are devoid of mouth and alimentary canal. Their anterior end has hooks and suckers. They are also hermaphrodite.