The slugs have only been found at the top of Mount Kaputar, an inland mountain near Narrabri in northern New South Wales within Mount Kaputar National Park, at an altitude around surrounded by snow gum trees. They have been observed to stay within this area, which is estimated to be . Most of the top of the mountain is designated wilderness. Although the mountain is surrounded by dry plains, it receives rainfall and snow, and its temperature is cooler than the plains. Thus it forms an isolated ecozone, or sky island; such sky islands are known for unique indigenous fauna and flora.