chaetosema

Definition

A small sensory organ composed of a cluster of sensory hairs, typically found near the compound eyes or ocelli in certain insects, such as moths and butterflies.

Etymology

From Greek 'chaite', meaning 'hair', and 'sema', meaning 'sign' or 'mark'.

Example

The chaetosemata on the head of the moth help the insect to sense its environment.

Related Terms

• Sensory organ
• Compound eyes
• Ocelli

Usage Notes

Chaetosemata are considered important for the sensory perception of some insects, aiding in navigation and environmental awareness.