The well-preserved fossil, discovered in Myanmar, belongs to a species called _Tetrapodophis amplectus_. It is believed to be a transitional species between lizards and snakes, with features of both groups.

_Tetrapodophis_ had a long, snake-like body, but it also possessed four tiny, vestigial legs. These legs were likely used for locomotion, but they were much smaller and weaker than the legs of lizards.

The fossil also shows that _Tetrapodophis_ had a pair of small pelvic bones, which are absent in modern snakes. These pelvic bones would have provided support for the legs.

The researchers believe that _Tetrapodophis_ represents an early stage in the evolution of snakes. They suggest that snakes gradually lost their legs over time as they became more adapted to burrowing and moving through narrow spaces.

The fossil of _Tetrapodophis_ is a significant discovery that provides important evidence about the evolutionary history of snakes. It helps to fill in the gaps in our understanding of how these fascinating creatures came to be.

Here are some additional details about the _Tetrapodophis_ fossil:

- It was discovered in the Hukawng Valley of Myanmar.

- The fossil is nearly complete, with most of the bones preserved.

- It is about 16 inches long.

- The skull has features that are similar to those of modern snakes, but the teeth are more like those of lizards.

- The vertebrae are similar to those of snakes, but they have small projections that may have been used for locomotion.

- The fossil has been dated to the Late Cretaceous period, about 99 million years ago.

The discovery of the _Tetrapodophis_ fossil is a significant contribution to our understanding of snake evolution. It provides new evidence that supports the theory that snakes evolved from lizards and gradually lost their legs over time.