1. Classes of Arthropods

2. Meristomata
HORSESHOE CRAB

3. CHARACTERISTICS 1. 2 body parts – cephalothorax and abdomen.
2. Long pointed tail

4. 3. 5 pairs of walking legs with pincers.

5. Arachnida
SPIDERS
TICKS
SCORPIONS

6. CHARACTERISTICS
2 body parts – Cephalothorax
and abdomen

7. 3. Fangs with poison glands
2. 4 pairs of walking legs.
3. Fangs with poison glands
(chelicerae), and
pedipalps

8. 4. Spinnerets and web making ability.

9. Diplopoda Characteristics 1. Repeating segments in body.
2. 2 pairs of legs per segment.
MILLIPEDES

10. Chilopoda Characteristics Repeated segments. 1 pair antennae
1 pair of legs
per segment.
CENTIPEDES

11. Crustacea
SOW
BUGS
CRABS
SHRIMP
LOBSTER
BARNACLES

12. Characteristics
1. 2 body parts –
cephalothorax and abdomen

13. 2. Many paired appendages A. At least 5 pairs of walking legs.
B. Chelipeds – Food getting and defense.

14. C. Swimmerets for protecting eggs. D. Uropod for fast getaway.

15. E. 2 pairs of antennae
F. Many mouth parts.

16. Insecta

17. Characteristics
1. 3 body parts – head thorax abdomen

18. 2. 3 pairs of walking legs.
3. 1 or 2 pairs of wings.
4. 1 pair of antennae.
5. Most undergo metamorphosis