1. THE INSECT HEAD AND ITS APPENDAGES

2. A good web site for insect anatomy

3. Head Capsule
Neck
Mouthparts

4. Head Segmentation

5. Insect Head Occiput Compound Eyes Ocelli Frons Gena Clypeus Mandible
Labrum
1st Maxilla
Labium (2nd Maxilla)

6. ? ? Insect Heads 3 basic types Prognathous Hypognathous
Opisthorhynchous

7. Insect Heads
Evolution of Prognathy
1. Hypostomal Bridge
2. Postgenal Bridge
3. Gula

8. Insect Mouthparts

9. Insect Mouthparts
Labrum
Mandible
Hypopharynx
1st Maxilla
Labium (2nd maxilla)

10. Insect Mouthparts
Labrum
-”upper lip”
- contains chemosensory sensilla

11. Insect Mouthparts
Mandible
Molar surface
Incisor surface

12. Insect Mouthparts
Mandible
- in a grasshopper -a dicondylic joint
-emphasize strength over mobility

13. Insect Mouthparts
1st Maxilla
Cardo
Stipes
Palp
Lacinia
Galea

14. Insect Mouthparts Labium (2nd Maxilla) can be fused to form a Ligula
Submentum
Mentum
Prementum
Glossa
Palp
Paraglossa
can be fused to form a
Ligula

15. Comparison of 1st and 2nd Maxillae
Cardo
Stipes
Submentum
Mentum
Palp
Lacinia
Prementum
Glossa
Palp
Paraglossa
Galea

16. Hypopharynx
Labium
Salivarium
Hypopharynx
Cibarium
Cibarium

18. Modifications of Mouthparts
-Piercing and Sucking
Front
Mandibles
Maxillae
Channel for food
Back
Channel for saliva

19. Modifications of Mouthparts
Cutting and Sponging
Labrum
Mandibles
Hypopharynx
Labellum
Maxillae
e. g. deerflies

20. Modifications of Mouthparts
Sponging
e.g. housefly

21. Modifications of Mouthparts
Siphoning
e.g. butterfly

22. Modifications of Mouthparts
Stabbing
e.g. Mosquito

23. Head Capsule
Neck
Mouthparts

24. Tentorium
- internal support for the head capsule
Posterior arms
Anterior arms
Dorsal arms
Cut away view of the head capsule

25. Tentorium
- internal support for the head capsule

26. Insect Antenna
Antennal sclerite
Antennal socket
Pedicel
Flagellum
Antennifer
Antennal suture
Scape

27. Insect Antennae Monoliform Aristate Pectinate Capitate Plumose Clavate
Serrate
Filiform
Geniculate

28. Insect Antennae Monoliform Aristate Capitate Pectinate Clavate Plumose
Filiform
Serrate
Geniculate