Class Mammalia Linnaeus, 1758 - mammals Order Marsupialia Jameson, 1818 - marsupials see Cohort Marsupialia Jameson, 1818 Family Macropodidae Gray, 1821 - wallabies and kangaroos Genus Peradorcas Thomas, 1904 - little rock wallaby see Genus Petrogale Gray, 1837 1 Peradorcas concinna (Gould, 1842) - little rock wallaby see Petrogale concinna Gould, 1842