L9 Phla Anthropoda

Question 1

Greek etymology of “Anthro” “Poda”

Answer 1

Jointed feet

Question 2

Characteristics of arthropods

Answer 2

1. Metamerism with tagmatization. Specialized body segments (tagma) have a specific function.
2. Chitinous exoskeleton providing support and protection.
3. Moulting/ecdysis of that exoskeleton in order to grow.
4. Jointed appendages that are paired.
5. Ventral nervous system.
6. Open circulatory system with hemocoel.
7. Compete digestive tract.
8. Coelom only covering the gonads and anus.
9. Metamorphosis happens in many but not all arthropods.

Question 3

The 4 subphyla

Answer 3

• Chelicerata
• Myriapoda (many feet)
• Crustacea (crustaceans)
• Hexapoda (six feet)

Question 4

The 5th extinct phyla

Answer 4

Trilobitomorpha