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5. bryozoa brachiopoda and nematoda
- 2. Colonial – asexually produced and interconnected
- 3. Exoskeleton called a zooecium excreted by individual zooids
- 5. Animals that are Moss likePhylum Bryozoa CnidarianHydroid Polyp Bryozoan Zooid
- 6. Animals that are Moss likePhylum Bryozoa Many different growth forms with the zooeciummade from calcium, chiton or protein Erect and branching e.g. Bugula sp The spiral bryozoan
- 7. Animals that are Moss likePhylum Bryozoa Many confuse them with hydroids or with corals e.g. Heteroporasp.thestaghornbryozoan
- 8. Animals that are Moss likePhylum Bryozoa Some look more like a fungus than moss e.g. Hippodiplosia sp. the fluted bryozoan
- 9. Animals that are Moss likePhylum Bryozoa Many others are encrusting e.g. Membranipora sp. the lacy kelp bryozoan e.g. Disporella sp. The purple bryozoan
- 10. Animals that are Moss likePhylum Bryozoa Byrozoan Polymorphism Different zooids can perform different functions Autozooids for feeding and reproduction
- 11. Animals that are Moss likePhylum Bryozoa Zooid is a single sex Colonies are hermaphroditic Ovicells are brooding chambers in the colony Free swimming larva emerge from ovicell, settle onto a suitable substrate and metamorph First zooid in a colony = ancestrula Forms new colonies by asexual budding
- 12. Animals that are Moss likePhylum Bryozoa Byrozoan Polymorphism Different zooids can perform different functions Heterozoids for cleaning and protection
- 13. Animals that are Moss likePhylum Bryozoacommon predators are crabs and nudibranchs
- 15. Lophophore
- 17. Animals that are Clam likePhylum Brachiopoda
- 18. Animals that are Clam likePhylum Brachiopoda 350 current species, as many as 30,000 known fossil species Dioecious broadcast spawners
- 19. Animals that are Worm likePhylum Nematodaone of the largest animal phyla occurring freely and abundantly almost everywhere
- 20. Animals that are Worm likePhylum Nematoda Unsegmented with a cylindrical body shape Covered by a tough exoskeleton – collagenous cuticle Cuticle sheds (molts) as the nematode grows
- 21. Animals that are Worm likePhylum Nematoda Complete digestive tract No circulatory system Muscles are all longitudinal – thrashing motion
- 22. Animals that are Worm likePhylum Nematoda Eutely (constancy of cell number) Epithelium is syncytial (many nuclei but not separated by a cell membrane
- 23. Animals that are Worm likePhylum Nematoda Many parasitic forms Cuticle around mouth with teeth like projections Cuticle protects from host digestive juices
- 24. Animals that are Worm likePhylum Nematoda Dioecious with internal fertilization Sperm cells amoeboid (not flagellated Females can release >100,000 eggs per day No free-swimming larval stage (emerge from egg as miniature adults) Dauer larva (a stage of developmental arrest)