Undulambia polystichalis, the leatherleaf fern borer moth, is a moth in the family Crambidae.

[1] It is found in Cuba and the south-eastern United States, where it has been recorded from Florida.

Adults are on wing from January to May and again from July to November.

The larvae feed on Rumohra adiantiformis.

[3] This Musotiminae-related article is a stub.