Class Mammalia Linnaeus, 1758 - mammals
   Order †Eutriconodonta Kermack, Mussett & Rigney, 1973, incertae sedis
     Family †Triconodontidae Marsh, 1887
       Subfamily †Tricondontinae Kermack & Kermack, 1971, orth. inval. see Subfamily Triconodontinae Marsh, 1887
         Genus †Trioracodon Simpson, 1928
           †Trioracodon major (Owen, 1871)