Once widespread across a larger range, it has become restricted to around ten reserves of remnant bushland in Southwest Australia and declared near threatened by extinction.

They are small and robust mice that live in burrows in sandy soil, venturing out at night to forage in nearby area.

[4] Assigned to a diverse and poorly resolved genus, Pseudomys, the describing author allied the species to a subgeneric classification as Gyomys.

[2] The term walyadji is used to refer to the species, but this word does not appear in a literature review of Noongar language names for mammals of the region.

[7] This mouse lives in loamy soils in areas that have not been burnt recently, and not known at any location that has been subjected to fire in the preceding 30 to 50 years.

The fragmented populations inhabit remnants of its preferred habitat, estimated from earlier surveys to be greater than 10 and a decline less than 30% in three generations.