'Southern lizard') was an extinct genus of sauropod dinosaur from the Allaru Formation, from the early Cretaceous (112-105 million years ago) of Central-Western Queensland in Australia.

Originally it was thought that sauropods spent time near or in water to relieve weight from their legs.

[2] However, this theory is now rejected and it is believed that Austrosaurus like all sauropods lived on dry land.

Hocknull et al. (2009) described the new sauropod Wintonotitan from material that originally assigned to Austrosaurus by Coombs and Molnar in 1981.

[4][5] Hocknull suggested that Austrosaurus mckillopi differed only slightly from the QMF 7292, the holotype of Wintonotitan wattsii, and should be considered a nomen dubium.