Phylum Platyhelminthes - Phylum Brachiopoda Marine “Worms” and False Clams Phylum Platyhelminthes includes flatworms, tapeworms and flukes bilateral symmetry body flattened dorsoventrally (back and front) Class Turbellaria: marine flatworms not parasitic move by cilia and/or slime trail found in benthic habitats have Ocelli (light sensitive eyespots) can regenerate!!! Very Strange Reproduction Penis Fencing Phylum Nemertina includes ribbon worms small, inconspicuous worms live in shallow water, benthic environments, often found in mussel beds complete digestive tract - first animal with mouth and anus have a proboscis - for defense and gathering food elastic worms can stretch, but break into pieces with the slightest disturbance - can regenerate Phylum Annelida Bilateral Symmetry Closed Circulatory System!!! Have Segments - internal and external Each segment has Parapodia (used for crawling, swimming, anchoring in tubes) also have Setae - bristles used for locomotion allows for “peristalic contractions”