Platyplectrurus madurensis

The Travancore Hills thorntail snake, also called the Palni purple-brown worm thorntail snake or the Madurai shield-tail snake, is a snake of the family Uropeltidae. It is found in the Western Ghats of India and, depending on the source, in Sri Lanka. The back is iridescent purplish brown (Wikipedia, general species account).

The Reptile Database lists Kerala. The account used here gives no information on size, habitat, diet or breeding.