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 More than 500,000 known species Class Polyplacophora
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 Polyplacophora chiton

9. Subclass Opisthobranchia
Class Gastropoda
Subclass Opisthobranchia
Spanish Dancer (nudibranch) & egg mass

10. nudibranchs Phistella
Phylum Mollusca
Class Gastropoda
nudibranchs Phistella

11. nudibranchs
Nembrotha kubaryana

12. nudibranchs Chromodoris annae Halgerda batangas Cuthona sp.

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

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

25. Blue-ringed octopus Highly venomous
                                     
The brilliantly colored blue ringed octopus (Hapalochlaena lunulata) hunts using a venom so powerful it can kill a human
Highly venomous