tornus

Definition

The tornal area refers to the inner angle at the hindwing's distal margin in butterflies and moths.

Etymology

From Latin 'tornus', meaning 'a turning' or 'a lathe'.

Example

The identification guide mentioned a distinctive spot in the tornus of the butterfly's hindwing.

Related Terms

• Hindwing
• Margin
• Wing anatomy

Usage Notes

The tornus is often a key feature in the identification of various species of butterflies and moths, as it can show distinctive markings or structures.