Class Mammalia Linnaeus, 1758 - mammals Subclass Theria Parker & Haswell, 1897 Infraclass Eutheria Gill, 1872 Cohort Ferungulata 1 Superorder Ferae Linnaeus, 1758 see Grandorder Ferae Linnaeus, 1758 2 Superorder Protungulata 3 Superorder Paenungulata Simpson, 1945 see Grandorder Paenungulata Simpson, 1945 4 Superorder Mesaxonia (Marsh, 1884) 5 Superorder Paraxonia (Marsh, 1884)