Class Mammalia Linnaeus, 1758 - mammals
   Order †Morganucodonta Kermack, Mussett & Rigney, 1973, incertae sedis
     1 Family †Morganucodontidae Kühne, 1958
     2 Family †Megazostrodontidae Gow, 1986
     3 Genus †Hallautherium Clemens, 1980, incertae sedis [monotypic]