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.
The specific name, deraniyagalae, is in honor of Sri Lankan zoologist Paulus Edward Pieris Deraniyagala.[1]
A. deraniyagalae is known from the eastern slopes of the central highlands of Sri Lanka. Localities recorded are Namunukula, Kanawarella, Spring Valley, and Pindarawatta.
The preferred natural habitat of A. deraniyagalae is forest, at elevations of around 1520m (4,990feet).
A. deraniyagalae is a small snake. The head is indistinct from the neck, and the body is cylindrical in cross section. The dorsum is light beige to dark brown. The head is dark-pigmented. The venter is blackish-brown, with lighter mottling.
A. deraniyagalae has the following scalation. The dorsal scales are arranged in 17 rows at midbody. Preoculars are present, forming a part of the anterior border of the orbit of the eye. The 2 postoculars are in contact with the parietal. Ventrals 117–122. Subcaudals 13–26.
A. deraniyagalae is oviparous.[2] Sexually mature females produce about two to four eggs at a time.