1. Insects and Crustaceans
Diversity of Life
-Arthropoda –
Insects and Crustaceans

2. Arthropoda - Crustacea - lobsters, crabs, barnacles

3. Arthropoda - Crustacea - lobsters, crabs, barnacles
Characteristics -
1. Head and thorax are fused - cephalothorax

4. Arthropoda - Crustacea - lobsters, crabs, barnacles
Chelipeds (2)
Head and thorax are fused - cephalothorax
Walking legs (8)
Abdomen
Telson
Uropods

5. Arthropoda - Crustacea - lobsters, crabs, barnacles
Swimmerets

6. Arthropoda - Crustacea - lobsters, crabs, barnacles
Shrimp

7. Arthropoda - Crustacea - lobsters, crabs, barnacles
Crab – ventral view

8. Arthropoda - Crustacea - lobsters, crabs, barnacles

9. Arthropoda - Crustacea - lobsters, crabs, barnacles

10. Arthropoda - Uniramia - the insects
Most common kind of animal - greatest number of species

11. Arthropoda - Uniramia - the insects
Most common kind of animal - greatest number of species

12. Arthropoda - Uniramia - the insects
Most common kind of animal - greatest number of species
Characteristics -
Six legs
2. Distinct head, thorax and abdomen

13. Arthropoda - Uniramia - the insects
Characteristics
3. Wings
Insects are the only invertebrates to have mastered flight

14. Insect – Digestive system
ventriculus
crop
esophagus
rectum
pharynx
anus
mouth
ileum
Malpighian tubules

15. Generalized Insect Circulatory system
Dorsal Vessel
aorta
heart
Ostia
Dorsal diaphragm
Ventral diaphragm
Perivisceral sinus
Pericardial sinus
Perineural sinus

16. Generalized Insect Circulatory system
Movement of Blood
Blood Pressure

17. Arthropoda - Uniramia - the insects
Characteristics -
3. Two kinds of life cycles
Complete (or holometabolous)
Egg larva pupa adult
Incomplete (or hemimetabolous)
Egg nymph adult

18. Arthropoda - Summary of characteristics
Group
Cheliceriformes
Uniramia
Myriapoda
Crustacea
Cephalothorax
Yes No
Number of legs 8 6
20+ 10
Flight
Jointed
appendages