How does the skull of *Rena humilis* function mechanically to facilitate its subterranean existence?

Answer

The skull bones are more fused, acting as a powerful wedge to push through the earth

The lifestyle spent beneath the surface mandates specialized mechanical adaptations for movement through dense soil. Unlike many modern snakes that possess kinetic skulls optimized for swallowing prey larger than their heads, the Western Blind Snake has evolved a skull where the bones are significantly more fused. This rigidity transforms the head into a structurally robust wedge, enabling the snake to exert significant force and effectively push its way through compacted earth and tunnels, which is a critical adaptation for its fossorial life.

How does the skull of *Rena humilis* function mechanically to facilitate its subterranean existence?
taxonomyanimalevolutionreptilesnake