Mollusca

Cephalopoda

Gastropoda

MolluscaMilestone= Coelom Characteristics, Larval Stage = TrochophoreGastropodaEx. Pond snails, And slugsEither shell-less or have a single spiral-shaped shellMove using a ventral foot CephalopodaEx. Octopus, squids Most active mollusksSoft-bodied, no shell or has a hard internal shellHead is attached to a single foot that divides into tentaclesBivalviaEx. Clams, oysters, mussels, scallopsHave two shellsFocus for this Phylum

Mollusca

Clam: Body Form & SkeletonExoskeletonfoot – muscular region on bottom used for locomotion Contains mouth, radula (tongue), and teethVisceral Mass – area that surrounds organsMantle – cape of heavy tissue outside organs, located right underneath the shellShell – created by the glands in the mantleTwo shells, held together by two powerful muscles.Clam: ReproductionReproduce SexuallyExternal ReproductionClams release a large amount of eggs and sperm into the water

Bivalvia- Clams, Oysters, Mussels,Scallops