Bio 204 Lab 10
1. 4 apomorphies for mollusca: -radula
-calcareous spicules
-muscular foot
-mantle
2. what functional benefit does the segmented shell of polyplacophorans con-
fer: allow the chiton to curve around and tightly adhere to a a substrate
3. 2 apomorphies for polyplacophora: -shell with 7-8 plates
-mantle fused with shell plates
4. what unique developmental process occurs in gastropods: torsion, rotation of the
visceral mass and its overlying mantle and shell
5. apomorphy for the gastropods: torsion
6. 4 apomorphies for the cephalopoda: -ink sac
-beak like jaw
1/2
1. 4 apomorphies for mollusca: -radula
-calcareous spicules
-muscular foot
-mantle
2. what functional benefit does the segmented shell of polyplacophorans con-
fer: allow the chiton to curve around and tightly adhere to a a substrate
3. 2 apomorphies for polyplacophora: -shell with 7-8 plates
-mantle fused with shell plates
4. what unique developmental process occurs in gastropods: torsion, rotation of the
visceral mass and its overlying mantle and shell
5. apomorphy for the gastropods: torsion
6. 4 apomorphies for the cephalopoda: -ink sac
-beak like jaw
1/2