Phylum Mollusca Fig. 16.CO

Phylum Mollusca Coelomates Tridacna gigas Tridacna squamosa

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

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

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

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

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

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

Fig. 16.23a

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

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

Squid are the largest Cephalopods

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

Adult Abalone Fig. 16.15a

Phylum Mollusca, Class Bilvalia Fig. 16.25

Generalized Bivalve Anatomy Fig. 16.26

Fig. 16.31b

Bivalves are Typically Filter Feeders Fig. 16.31a

Bivalve Life Cycle Fig. 16.34