the species is represented in the records of many southern fossil sites in australia, including tasmania. the type locality is located in southwest australia, at mammoth cave, and evidence from another site in the southwest indicates it existed until about 42 000 years ago. fossils assigned to the species have been obtained at sites in the southwest, southern regions of central australia and the southeast of the continent. in tasmania "s. occidentalis" has been identified at fossil sites in the northeast and central regions, the species has also been found at the nearby king island.