All wombats (fossil and extinct) have only been found in Australia.
Rhizophascolonus crowcrofti is known from two localities within Australia:
This species lived between 25 and 15 million years ago.
Modern wombats burrow underground. It is not known whether Rhizophascolonus crowcrofti also burrowed.
Grass comprises a significant portion of the diet of modern wombats. This diet means that the teeth of modern wombats wear very quickly (this is why they have ever-growing teeth).
Although the teeth of Rhizophascolonus crowcrofti did not grow throughout life (as they possessed tooth roots) their molars are very worn. This means that they probably ate abrasive material such as plant roots.