Corium (entomology)

The corium is the thickened, leathery, basal portion of the forewing or hemelytron of an insect in the order Hemiptera, suborder Heteroptera.

Specifically, the large anterior portion of the basal region is the corium.

The thickened region is divided into a large, anterior corium and much smaller, posterior clavus.

[1] The membranous apical region typically has veins and the venation is of taxonomic importance.

The hind wings are fully membranous and held beneath the hemelytra when at rest.