Mussel dissection

Mussel dissection

1. Mussel Dissection

2. Hinge Anterior Posterior Dorsal Ventral Byssus Excurrent Siphon Incurrent Siphon Posterior adductor muscle (shell closers) Mussel Dissection

3. Hinge Mantle edge (secretes shell and is sensory) Mantle surface (containing outgrowth of gonad) Incurrent and excurrent siphons Mussel Dissection

4. Byssus Foot Palp Visceral mass Right gill (filaments separated) Left gill Mussel Dissection

5. Parts mussel

6. Hinge Posterior adductor muscle (shell closer) Foot retractors Mantle attachment scar Tiny anterior adductor muscle (shell closer) Mussel Dissection

7. Posterior adductor & retractor muscles elongate, thin (California) Anterior adductor muscle on ventral edge (Bay) Mussel Dissection Anterior adductor muscle centered (California) Posterior adductor & retractor muscles shortened, wide (Bay) Muscle scars on shell distinguish Bay from California mussels