Australia’s marsupials, including kangaroos, koalas, wombats and wallabies, are thought to have reached the continent about 55 million years ago as Gondwana was breaking apart. Fossil Teeth Uncovered an Entirely New Marsupial LineageThe new order, Keeunamorphia, includes the genera Keeuna and Phantasmodon. Phantasmodon travouilloni n. gen. n. sp. Phantasmodon travouilloni n. gen. n. sp. Phantasmodon travouilloni n. gen. n. sp.