Clade Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758 Clade Trechnotheria McKenna 1975 Clade Alethinotheria Averianov, Martin & Lopatin 2013 Clade Cladotheria McKenna 1975 Genus †Palaeoxonodon Freeman, 1976 1 †Palaeoxonodon ooliticus Freeman, 1979