Mammaliaformes Rowe 1988, nom. cl. inval. see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
   [crown] Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
         1 ?Family †Chronoperatidae Fox, Youzwyshyn & Krause, 1992
         2 Superlegion †Kuehneotheria McKenna, 1975 see Order Kuehneotheria McKenna, 1975
         3 Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975