Thylacoleo Temporal range: late Pliocene—late Pleistocene Skeleton of a Thylacoleo carnifex in the Victoria Fossil Cave, Naracoorte Caves National Park Scientific classification Kingdom: Animalia Phylum: Chordata Class: Mammalia Infraclass: Marsupialia Order: Diprotodontia Family: †Thylacoleonidae Genus: †Thylacoleo Owen, 1859 Species Thylacoleo carnifex Thylacoleo crassidentatus Thylacoleo hilli