Tiliqua rugosa asper is the only subspecies native to eastern Australia, where it goes by the common name Eastern Shingleback.
"T. r. aspera is more robust, with broader head, shorter thicker tail and larger, more rugose body scales. Colour and pattern variable but no orange flush on head."
A Complete Guide to Reptiles of Australia' by Steve Wilson and Gerry Swan, 6th Edition. 2021
Tiliqua rugosa aspera is listed in the following regions:
Central West NSW | Riverina Murray | Far West New South Wales | Loddon Mallee | South West Queensland | South East South Australia