Clade Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Class Mammalia Linnaeus, 1758 Clade Trechnotheria McKenna 1975 Clade Alethinotheria Averianov, Martin & Lopatin 2013 Family †Spalacotheriidae Marsh, 1887 1 Genus †Spalacotherium Owen, 1854 2 Genus †Spalacolestes Cifelli & Madsen, 1999