Aspidura deraniyagalae, commonly known as Deraniyagala's rough-sided snake, the Sri Lanka rough-sided snake, and කදු මැඩිල්ලා (kandu medilla) in Sinhala, is a colubrid species endemic to Sri Lanka.

[2] A. deraniyagalae is known from the eastern slopes of the central highlands of Sri Lanka.

Localities recorded are Namunukula, Kanawarella, Spring Valley, and Pindarawatta.

[citation needed] The preferred natural habitat of A. deraniyagalae is forest, at elevations of around 1,520 m (4,990 ft).

Preoculars are present, forming a part of the anterior border of the orbit of the eye.