The scaly-tailed possum or the Ilangnalya (Wyulda squamicaudata) is found in northwestern Australia. It is restricted to the Kimberley region in Western Australia. As it is monotypic in its genus, it is sometimes known simply by its genus — the Wyulda.The scaly-tailed possum is a member of the family Phalangeridae, which means that it is related to cuscuses and brushtail possums.