Class Mammalia Linnaeus, 1758 - mammals
Subclass Theria Parker & Haswell, 1897
Infraclass Tribosphenida McKenna, 1975
see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
Supercohort Eutheria Gill, 1872
see Infraclass Eutheria Gill, 1872
Cohort Edentata Cuvier, 1798
Order †Palaeanodonta Matthew, 1918
Family †Epoicotheriidae Simpson, 1927
Subfamily †Epoicotheriinae Simpson, 1927
?Genus †Tetrapassalus Simpson, 1959
†Tetrapassalus mckennaiᵀ Simpson, 1959