These pythons are readily distinguished from all other Australian species by the absence of pits on the labial or rostral scales. Other diagnostic traits are the absence of teeth on the premaxilla and enlarged symmetrical shields on the top of the head. Prior to now, most authorities have divided the genus into two well-defined species. The former is separated from the latter by its distinct glossy black head. At best the latter only has black markings on the head.
Few authors recognize subspecies or races.
Taxonomy of this genus has gained greater interest in recent years with the introduction of more formalized reptile-keeper licensing systems in most Australian states combined with the high prices of specimens traded. Authorities in some states have taken a strong stand against hybridization of races of snakes, a view shared by a substantial number of private keepers. Noting that distinct differences between races of Aspidites are well known and acknowledged and that for many years a substantial number of herpetologists have recognized different races as being at least different subspecies, it is somewhat surprising that up until now no one has put names to these different races. There is presently no evidence of cross-breeding between the two species either in the wild or captivity. To date no similar sympatry has been recorded in Queensland.