uropeltids

After all, modern burrowing snakes themselves have highly derived characteristics (skull and jaw architecture) that are different from other snakes (the uropeltids, for instance, have highly modified vertebrae to facilitate burrowing), and indicate to me that their burrowing habits evolved independently of other snakes, after they had already diverged.

In the, "it's so sad, it's funny" category today... - The Panda's Thumb