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, like other Australian species, inhabited the time period between the Oligocene and Miocene epochs (around 26-24 million years ago). Besides the original type material, specimens from different locations are also classified as this species, including fossils found in the Namba Formation. It is the larger of the Australian species and comparable in size to European P. ambiguus and P. crassipes.