

A population that discovered in southern New Guinea that was recognised as having a close affinity to the description of this species. The nominate subspecies occurring across the north of mainland Australia, Arnhem Land, the Kimberley and Cape York Peninsula.

(rubidus referring to its reddish coloration) The holotype of this subspecies was obtained near Cue, Western Australia, at the midwest of the continent, and the population is endemic to the north and west of that state.

Three subspecies are recognised by the Australian Faunal Directory and the Reptile Database: By issuing an opinion on the various taxonomic considerations, the voting members conserved the name published with John Edward Gray's description and stabilised the nomenclature of this species name. The describing author discovered that the specimen selected as the type of Varanus gouldii was in fact assignable to this species, recently described by reptile specialist Glenn Storr. Ī third subspecies was published in 1988, based on specimens from southern New Guinea. Early collections and descriptions of the region's species have historically been uncertain, leading the ICZN to issue an opinion that related to this taxon. The first description of the species was provided in a revision of the varanids of Western Australia, where the family is represented by diverse taxa in a wide variety of habitats.
