Like the other Australian species, P. wilsoni lived from the Oligocene to Miocene (c. 26-24 mya). Several specimens from different localities are referred to this species in addition to the type material, including bones from the Namba Formation. It is the larger of the Australian species and approximately the size of the European P. ambiguus and P. crassipes.
P. wilsoni shares characteristics with other Australian species that lived between the Oligocene and Miocene epochs (approximately 26-24 million years ago). In addition to the original type specimens, bones from various locations are also attributed to this species, including those found in the Namba Formation. It is the larger of the Australian species and comparable in size to European P. ambiguus and P. crassipes.