Urodeta gnoma is a moth of the Elachistidae family. It is found in Kenya. The wingspan is 5.2–5.9 mm. The ground colour of the forewings is pale ochre to ochre, mottled by brownish-black tips of the scales. Denser brownish-black scales form two irregular patches and brownish-black scales form two small spots. The fringe scales are brownish grey with irregularly scattered brownish black-tipped scales. The hindwings are blackish brown, with a brownish grey fringe.