Nemaxera is a genus of the fungus moth family, Tineidae.

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.