What specialized structure is located at the tail terminus of *R. humilis* to aid in forward propulsion within tunnels?
Answer
A small, hardened spur
The tail of the Western Blind Snake is highly adapted for its subterranean locomotion, functioning beyond just balance or rudder control seen in surface snakes. It terminates in a distinct feature: a small, hardened spur. This spur is actively used by the snake to jab into the walls of its constructed tunnels. This action provides essential purchase and leverage, allowing the snake to anchor itself momentarily so it can effectively push its rigid body forward through the dense soil medium.
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