[1] Based on the structure of the hind limbs and pelvic girdle of Aardonyx, the dinosaur normally moved bipedally but could drop to quadrupedal movement similar to Iguanodon.

[2] Australian[3][4] paleontologist Adam Yates and his team's discovery of the genus was published online before print in Proceedings of the Royal Society B in November 2009, and was scheduled to appear in the March 2010 issue.

[2] British paleontologist Paul Barrett of the Natural History Museum, London, who was not involved in the research, commented that the discovery of Aardonyx "helps to fill a marked gap in our knowledge of sauropod evolution, showing how a primarily two-legged animal could start to acquire the specific features necessary for a life spent on all-fours".

What Aardonyx shows us, however, is that walking quadrupedally and bearing weight on the inside of the foot is a trend that started very early in these dinosaurs, much earlier than previously hypothesized."

[1] Aardonyx is thought to be the sister taxon of a sauropodomorph clade containing Melanorosaurus and sauropods, which are all obligatory quadrupeds, based on a phylogenetic analysis conducted along with the first description of the genus.

The lateral neurovascular foramina of the maxilla of Aardonyx are smaller than those of other basal sauropodomorphs, and indicate that there was a reduction in blood supply to the buccal tissues and thus a loss of fleshy cheeks.

The development of lateral plates along the alveolar margins of some bones of the skull would have helped brace the lingual sides of the teeth against bucco-lingual forces during foliage stripping.

Evidence for bipedalism can be seen in the forelimbs; the structure of the radius and ulna limited the degree to which the manus could be pronated, and the length of the humerus is only 72 percent that of the femur.

The development of entaxony in Aardonyx provides further evidence for its reduced cursorial ability and wider gauge-gait, which is thought to have preceded obligatory quadrupedalism in sauropodomorphs.