Platyplectrurus trilineatus, commonly known as the Tri-striped shieldtail snake or the lined thorntail snake, is a species of uropeltid snake endemic to the Western Ghats of Southern India. Like most other shieldtail snakes, it is presumed to be a nocturnal, fossorial snake inhabiting evergreen forests. A very rare snake, about which nothing is known in terms of live colouration and natural history.