Lophognathus is a genus of lizards found in northern Australia extending south to the Murray-Darling Basin, New Guinea, and Tanimbar Islands. The five species are informally described as dragons, as are several genera in the family Agamidae, and closely related to those of Amphibolurus. In Australia, these lizards are colloquially known as "Ta Ta" lizards, due to their habit of "waving" after running across hot surfaces.