Class Mammalia Linnaeus, 1758 - mammals
   Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001 - tribotherians see Clade Boreosphenida Luo, Cifelli & Kielan-Jaworowska 2001
     Genus †Slaughteria Butler, 1978, incertae sedis [monotypic] see Genus Pappotherium Slaughter, 1965
       1 †Slaughteria eruptens Butler, 1978 see Pappotherium pattersoni Slaughter, 1965