"A. bidwillii" has a limited distribution within Australia in part because of the drying out of Australia with loss of rainforest and poor seed dispersal. The remnant sites at the Bunya Mountains and Mount Lewis in Queensland have genetic diversity. The cones are large, soft-shelled and nutritious and fall intact to the ground beneath the tree before dehiscing. The suggestion that extinct large animals – perhaps dinosaurs and later, large mammals – may have been dispersers for the Bunya is reasonable, given the seeds' size and energy content, but difficult to confirm given the incompleteness of the fossil record for coprolites.