1. Phylum Mollusca
Fig. 16.CO

2. Phylum Mollusca
Coelomates
Tridacna gigas
Tridacna squamosa

3. Phylum Mollusca Soft Bodied Shelled Cephalization Body Plan
Some without
Cephalization
Sensory organs
Mouths
Body Plan
Visceral Mass
Head-Foot
Mantle
Fig. 16.1a
Tonicella lineata

4. Phylum Mollusca Complete digestive tract Digestive glands
Octopus briareus
Complete digestive tract
Digestive glands
Specialized feeding structures
Circulatory system
Heart (2 chambers)
Open system in most groups
Closed in cephalopods

5. Phylum Mollusca Advanced nervous system Excretory system Reproduction
Brain
Sensory organs
Eyes
Sensory papillae
Excretory system
Kidney-like nephridia
Reproduction
Some hermaphroditic
Some have genders

6. Gastropoda – snails, slugs Cephalopoda – octopi, squid
Mollusc Taxonomy
Gastropoda – snails, slugs
Cephalopoda – octopi, squid
Bivalvia – clams, oysters, scallops

7. Gastropoda Mollusc Taxonomy
Atlantic triton’s trumpet (Charonia variegata)
Mollusc Taxonomy
Gastropoda
Tiger cowrie (Cypraea tigris)

8. Gastropoda) Mollusc Taxonomy Spotted sea hare (Aplysia dactylomela)
zebra sea goddess (Hypselodoris zebra)
Phidiana hiltoni

9. Fig a

10. Gastropoda Mollusc Taxonomy Helminthoglypta walkeriana
Giant banana slug (Ariolimax columbians)

11. Cephalopoda Mollusc Taxonomy Giant cuttlefish (Sepia latimanus)
Octopus, squid, nautilus
Octopus sp
Nautilus sp

12. Squid are the largest Cephalopods

13. Bivalvia Mollusc Taxonomy Bay scallop (Aequipecten irradians)
Clams, oysters, mussels, scallops
Edible mussels (Mytilus edulis)
Ostrea edulis

14. Adult Abalone
Fig a

15. Phylum Mollusca, Class Bilvalia
Fig

16. Generalized Bivalve Anatomy
Fig

17. Fig b

18. Bivalves are Typically Filter Feeders
Fig a

19. Bivalve Life Cycle
Fig