vertex

Definition

The top or highest part of an insect's head, often where critical sensory structures like ocelli (simple eyes) are located.

Etymology

From Latin 'vertex', meaning 'whirlpool' or 'crown of the head'.

Example

The ocelli on the vertex of the dragonfly allow it to detect changes in light intensity.

Synonyms

• Crown
• Top of the head

Related Terms

• Ocelli
• Head
• Sensory structures

Usage Notes

In many insects, the vertex is a crucial area for sensory function and can be used for determining the arrangement of other structures on the head.