Lophognathus is a genus of lizards found in northern Australia, New Guinea, and Tanimbar Islands. The four species are informally described as dragons, as are several genera in the family Agamidae, and closely related to those of Amphibolurus. Lophognathus species are slender, slightly compressed, agamid lizards that are often found in trees. They occur in a variety of habitat, including sand dunes and arid regions, but frequently near watercourses. Two species are endemic to Australia, Lophognathus gilberti and L. longirostris, L. temporalis is also found in New Guinea.