Insect antennae and its modifications

1. Insect antennae

2. Antennae
• Basic structure :
segments 1 - scape
segments 2 – pedicel
and flagellum
function – primarily sensory perception
motion and orientation,
odour, sound, humidity etc .

3. Insect AntennAe modificAtions
1. Aristate- House flies
2. Capitate-Butterflies
3. Clavate- Carrion beetles
4. Filiform- Cockroaches
5. Geniculate- Bees
6. Lamillate- Scarab beetles
7. Moniliform- Termites
8. Pectinate- Fireflies
9. Plumose- mosquito
10. Serrate- Click Beetles
11. Setaceous- dragonflies

4. 1. ARISTATE
pouch-like with a lateral bristle
arista projecting dorsally from the third segment
Examples: House flies
(order - Diptera)

5. 2. Capitate
• abruptly clubbed at the end
Examples: Butterflies
(order Lepidoptera).

6. 3. Clavate
• antennae are gradually clubbed at the end
Examples: carrion beetles
(order - Coleoptera)

7. 4.Filiform
• antennae have a thread-like shape
Examples: Ground and longhorned beetles
(order - Coleoptera)
cockroaches
(order - Blattaria)

8. 5. Geniculate
• antennae are hinged or bent like an elbow
Examples: Bees and ants
(order - Hymenoptera)

9. 6. Lamellate
• These are clubbed antennae and
end with nested plates
lamella – leaf like
Examples: Scarab beetles
(order - Coleoptera)

10. 7. Moniliform
• Bead-like shape
Examples: Termites
(order Isoptera)

11. 8. Pectinate
• have a comb-like shape
Examples: Fire-colored beetles and fireflies
(order - coleoptera

12. 9. Plumose
• antennae have a feather-like shape
Examples: Moths
(order Lepidoptera)
mosquitoes (order Diptera)

13. 10. Serrate
• antennae have a saw-toothed shape
Examples: Click beetles
(order - Coleoptera)

14. 11. Setaceous
• antennae have a bristle-like shape
Examples: Dragonflies and damselflies
(order - Odonata)

15. Insect AntennAe modificAtions
1. Aristate- House flies
2. Capitate-Butterflies
3. Clavate- Carrion beetles
4. Filiform- Cockroaches
5. Geniculate- Bees
6. Lamillate- Scarab beetles
7. Moniliform- Termites
8. Pectinate- Fireflies
9. Plumose- mosquito
10. Serrate- Click Beetles
11. Setaceous- dragonflies