Nemaxera is a genus of the fungus moth family, Tineidae. Therein, it belongs to the subfamily Nemapogoninae. The genus is considered monotypic, with the single species Nemaxera betulinella placed here.[1]
The species occurs in western Eurasia east of France; it is also found in Great Britain but appears to be absent from the Balkans. Its caterpillars feed mainly on fungi, namely birch polypore (Fomitopsis betulina) and turkey tail (Trametes versicolor). To a lesser extent, they eat rotting wood.[2]
Junior synonyms of N. betulinella are:[3]