Blue-tongued skinks are closely related to the genera "Cyclodomorphus" and "Hemisphaeriodon". All species are found on mainland Australia except "Tiliqua gigas" which lives in New Guinea and various islands of Indonesia. One subspecies of "Tiliqua scincoides" is also found on several small Indonesian islands between Australia and New Guinea. "Tiliqua nigrolutea" is the only species in Tasmania. With the exception of the pygmy blue-tongue, they are large lizards which can grow up to 45 cm total length. They are light-bodied, short-limbed, broad with a distinct head and dull teeth.