Tiliqua rugosa palarra occurs "on mid-w. coast, from Shark Bay to Carnavon, WA."
"T. r. palarra has relatively narrow dark head, pale streaks and spots and a large brown mid-ventral patch."
'A Complete Guide to Reptiles of Australia' by Steve Wilson and Gerry Swan, 6th Edition. 2021.
Tiliqua rugosa palarra is listed in the following regions: