Invertebrates II

Invertebrates II

1. Lophotrochozoan

   • Phylum Platyhelminthes
     • - 20,000 species of flatworms
       • Four Classes of Flatworms
         • Turbellaria (free living flatworms): Most marine but some freshwater, some terrestrial. Predators and scavengers, body surfaced ciliated
         • Monogenea: Marine and freshwater parasites. Most infect ternal surfaces of fishes. ciliated larva starts infection on host
         • Trematoda(flukes): Parasites, Vertebrates, Two suckers that attach to the host, most life cycle includes host
         • Cestoda (tapeworms)