TEGULA can mean:

• the Latin term for the convex covering tile of a roof, as distinguished from the imbrex, the concave tile. It is made by overlapping plates.
• a small sclerite situated above the base of the costal vein in the wings of various insects such as Lepidoptera, Hymenoptera, Diptera, and Homoptera, and attached to the antero-lateral portion of the mesonotum.

Latin language | Tegula