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Mollusks

Mollusks. Phylogeny. Platyhelminthes. Porifera. Mollusca. Chordata. Arthropoda. Annelida. Cnideria. Nematoda. Echinodermata. pseudocoelom. segmentation. acoelom. Protostome: schizocoelem. Deuterostomes: eucoelom. radial symmetry. bilateral symmetry. no true tissues. true tissue.

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Mollusks

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  1. Mollusks

  2. Phylogeny Platyhelminthes Porifera Mollusca Chordata Arthropoda Annelida Cnideria Nematoda Echinodermata pseudocoelom segmentation acoelom Protostome: schizocoelem Deuterostomes: eucoelom radial symmetry bilateral symmetry no true tissues true tissue Ancestral Protist

  3. Phylum Mollusca Class Polyplacophora Class Gastropoda Class Bivalvia Class Cephalopoda chitons Snails Sea slugs nudibranchs Squid Octopus Cuttlefish Nautilus clams More than 500,000 known species

  4. Body Plan Three main parts: • Muscular foot- for movement • Visceral mass- contains most of the internal organs • Mantle cavity- houses gills

  5. Generalized Mollusc Anatomy mantle visceral mass foot

  6. Feeding Types • Grazers (radula- scraping tongue) • Filter feeding • Egg eaters • Active predation

  7. Kingdom Animalia Phylum Mollusca

  8. Class Polyplacophorachiton

  9. Class Gastropoda Also called Univalvia Spanish Dancer (nudibranch) & egg mass

  10. nudibranchsPhistella Phylum Mollusca Class Gastropoda

  11. nudibranchs Nembrotha kubaryana

  12. nudibranchs Chromodoris annae Halgerda batangas Cuthona sp. Chromodoris

  13. Class Gastropoda periwinkle Opihi Cowery Cone snail

  14. Epitomium

  15. Triton’s trumpet

  16. pterapods

  17. Class Bivalvia

  18. oyster

  19. Class Cephalopoda

  20. Class Cephalopoda

  21. Class Cephalopoda http://www.youtube.com/watch?v=U2s3C0lkQE0 http://www.youtube.com/watch?v=NR53smpV_xg

  22. Class Cephalopoda

  23. Octopus Intelligence http://www.youtube.com/watch?v=GQwJXvlTWDw Start at 2 minutes

  24. Mimic octopus from Indonesia flatfish Sea snake lionfish http://www.youtube.com/watch?v=H8oQBYw6xxc

  25. Blue-ringed octopus Highly venomous

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