Brachiopoda (Arm-footed)

Question 1

Bivalve Mollusc vs Brachiopod

Answer 1

Brachiopod valves are dorsal and ventral. Bivalves valves are lateral (left and right)

Question 2

Brachiopod Apomorphies

Answer 2

Bivalve shell and mantle, Brachia (Calcareous lopophore support), Heart is dorsal, Digestive ceca

Question 3

Pedicle and Adductor muscles vs Abductor muscles in Brachiopoda

Answer 3

Adducter closes shell, abducter opens. Pedicle anchors to substrate

Question 4

Shell secreted by…

Answer 4

outer mantle edge

Question 5

Chaetae

Answer 5

Small bristles serving as tactile sensory devices

Question 6

Upstream particle collection system

Answer 6

Suspension system via specific channels

Question 7

Branchial Tube

Answer 7

Transports particles to mouth - rejected particles expelled through exhalent canal

Question 8

Reproduction in Brachiopoda

Answer 8

Gonochoric offspring (both sexes), free spawner (fertilization in water coloumn), larvae undergo metamorphosis