LAB 9: Lophotrochozoa I

Question 1

Phylum Platyhelminthes
what animal it includes, what are the features and, selected taxonomy

Answer 1

(flatworms)
Important Features: 1. triploblastic
2. bilateral symmetry
3. acoelomate body plan
4. cephalization
Selected Taxonomy: Class Turbellaria – free living flatworms; e.g, Planaria
Class Trematoda – digenetic flukes (2 hosts); all parasitic
Class Cestoda – tapeworms; all parasitic

Question 2

Phylum Ectoprocta
synapomorphy and important features

Answer 2

Synapomorphies: 1. anus outside the crown of the lophophore
2. retractable lophophore
Important Features: 1. coelomate body plan
2. lophophore
3. zooids in zoecium

Question 3

Phylum Brachiopoda
what animal it includes, synapomorphy and important features

Answer 3

lamp shells
Synapomorphy: 1. possess dorsal and ventral valves
Important Features: 1. Coelomate body plan
2. lophophore

Question 4

Phylum Rotifera
what animal is included, key features, and important features

Answer 4

(rotifers, wheel animals)
Key features: 1. corona
2. mastax
3. toes with adhesive glands
Important Features: 1. pseudocoelomate body plan
2. complete gut
3. protonephridia (flame cell)

Question 5

parenchyma

Answer 5

-a type of spongy tissue

Question 6

eye spot

Answer 6

ocelli
-light sensing organ

Question 7

Miracidium

Answer 7

a free-swimming ciliated larval stage in which a parasitic fluke passes from the egg to its first host, typically a snail.