Anal fold

Definition

A fold on the posterior margin of the abdomen observed in some insects, particularly in their nymph or larval stages, which may assist in locomotion or maintaining a specific body posture.

Etymology

Derived from the Latin 'anus' meaning 'ring' or 'anus' and the English 'fold', referring to a crease or line where something folds.

Example

The anal fold of the dragonfly nymph aids in its movement through the water.

Synonyms

• Posterior fold

Related Terms

• Abdomen
• Nymph
• Larva
• Locomotion

Usage Notes

Anal folds are more prevalent and noticeable in the juvenile stages of certain insects and often play a role in their mobility or stability.