bio107: lab 1 for exam 2- Mollusca and Annelida

Clam glochida
Phylum Mollusca, Class Pelecypoda

Nereis parapodium
Phylum Annelida, Class Polychaeta

Earthworm Intestinal Region
Phylum Annelida, Class Oligochaetac

Clam/mussel
mantle

Clam/mussel gonad, liver and stuff
Once you orient the clam so that the left shell is on top (the one open), you know that the mouth and foot will be to the left. You can orient based on the umbo (draw line down center through umbu, and short side is "front" which makes the shell you are looking at the left shell). Green is liver. gonads and gills are pretty obvious. Anterior adductor muscle will be to your left. Posterior adductor muscle will be to the right.

Phylum Annelida, Class Polychaeta

Phylum Annelida, Class Hirudinea (leeches)

Phylum Mollusca, Class Amphineura (Chitons- 8 pony plates)

Phylum Annelida, Class Oligochaeta

Phylum Annelida, Class Hirudinea (leeches)

Phylum Mollusca, Class Scaphapoda ("tooth shells"- shells actually look like tusks of an elephant)

Phylum Mollusca, Class Pelecypoda (Bivalves- like clams)

Phylum Mollusca, Class Amphineura (Chitons- 8 pony plates)

Phylum Mollusca, Class Pelecypoda (Bivalves- like clams)

Phylum Mollusca, Class Amphineura (Chitons- 8 pony plates)

Phylum Mollusca
Class Gastropoda (Coils, spirals, like snails- caused by torsion)

Phylum Mollusca
Class Gastopoda

Phylum Mollusca
Class Gastropoda (Coils, spirals, like snails- caused by torsion)

Phylum Mollusca
Class Cephelapoda (squid, nautilus. Have internal shell called a "pen". The coiled shell is of a nautilus which is like a squid but with this shell. Do not get this shell of the nautilus confused with the coiled shells of the Class Gastropoda)