Kronosaurus (/ˌkrɒnoʊˈsɔːrəs/ KRON-oh-SOR-əs; meaning “lizard of Kronos”) is an extinct genus of short-necked pliosaurs that lived during the Early Cretaceous period (Aptian to Late Albian) in what is now Australia. It is a monotypic genus with one species K. queenslandicus, described in 1924 from the Toolebuc Formation in Queensland, Australia. With traditionally attributed fossils indicating a total length of up to 10 meters (33 ft), Kronosaurus may have been among the largest pliosaurs.