costal fold

Definition

A structure found on the forewings of certain moths, consisting of a fold or flap that can hold androconia (scent scales) and is used in the dispersal of pheromones during mating.

Etymology

Derived from Latin 'costalis,' meaning 'rib,' referring to the costal (leading) edge of the wing, and 'fold,' meaning a crease or pleat.

Example

The male moth uses its costal fold to release pheromones and attract females during the mating ritual.

Related Terms

• Androconia
• Pheromones
• Forewing

Usage Notes

Costal folds are primarily observed in various species of moths and play a crucial role in the mating process by aiding in the dispersal of pheromones.