Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Metatheria Huxley, 1880 Order Dasyuromorphia Gill, 1872 1 Family ‡Thylacinidae Bonaparte, 1838 2 Family Myrmecobiidae Waterhouse, 1841 3 Family Dasyuridae Goldfuss, 1820 - marsupial "mice" and "cats", and Tasmanian devil