Stigmella crenulatae is a moth of the Nepticulidae family. It is found on the Canary Islands and the Iberian Peninsula. The larvae feed on Rhamnus crenulata and Rhamnus lycioides. They mine the leaves of their host plant. The mine consists of a slender corridor, mostly partly following the leaf margin. The corridor widens in the end into a small blotch. The frass is concentrated in a broad central line.