Mammaliaformes Rowe 1988
Ref: M.C. McKenna & S.K. Bell, 1997: 511
[crown] Class Mammalia Linnaeus, 1758 - mammals
Ref: M.C. McKenna & S.K. Bell, 1997: 35
Subclass Theriiformes Rowe, 1988
see Division Theriiformes Rowe, 1988
Ref: M.C. McKenna & S.K. Bell, 1997: 36 [new rank]
Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995
see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
Ref: M.C. McKenna & S.K. Bell, 1997: 43 [new rank]
Superlegion Trechnotheria McKenna, 1975
see Clade Trechnotheria McKenna 1975
Ref: M.C. McKenna & S.K. Bell, 1997: 43 [new position]
Legion Cladotheria McKenna, 1975
see Clade Cladotheria McKenna 1975
Ref: M.C. McKenna & S.K. Bell, 1997: 45
Sublegion Zatheria McKenna, 1975
see Clade Zatheria McKenna 1975
Ref: M.C. McKenna & S.K. Bell, 1997: 48
Infralegion Tribosphenida McKenna, 1975
see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
Ref: M.C. McKenna & S.K. Bell, 1997: 48 [new rank]
[crown] Supercohort Theria Parker & Haswell, 1897 - therians
see Subclass Theria Parker & Haswell, 1897
Ref: M.C. McKenna & S.K. Bell, 1997: 49 [new rank]
Cohort Placentalia Owen, 1837 - placentals
Ref: M.C. McKenna & S.K. Bell, 1997: 80 [new rank]
Magnorder Epitheria McKenna, 1975
see Cohort Placentalia Owen, 1837
Ref: M.C. McKenna & S.K. Bell, 1997: 102 [new rank]
Superorder Preptotheria McKenna, 1975
Ref: M.C. McKenna & S.K. Bell, 1997: 104 [new position]
Grandorder Ungulata Linnaeus, 1766
Ref: M.C. McKenna & S.K. Bell, 1997: 357
Mirorder Eparctocyona McKenna, 1975
Ref: M.C. McKenna & S.K. Bell, 1997: 358
Order Cete Linnaeus, 1758
see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
Ref: M.C. McKenna & S.K. Bell, 1997: 366
Suborder Cetacea Brisson, 1762 - cetaceans
see Infraorder Cetacea Brisson, 1762
Ref: M.C. McKenna & S.K. Bell, 1997: 368 [new rank]
Infraorder †Archaeoceti Flower, 1883
Ref: M.C. McKenna & S.K. Bell, 1997: 368 [new rank]
Family †Protocetidae Stromer, 1908
Ref: M.C. McKenna & S.K. Bell, 1997: 369 [new position]
1 Genus †Rodhocetus Gingerich, Raza, Arif, Anwar & Zhou, 1994
Ref: M.C. McKenna & S.K. Bell, 1997: 370
2 Genus †Eocetus Fraas, 1904
Ref: M.C. McKenna & S.K. Bell, 1997: 370
3 Genus †Pappocetus Andrews, 1920
Ref: M.C. McKenna & S.K. Bell, 1997: 370
4 Genus †Babiacetus Trivedi & Satsangi, 1984
Ref: M.C. McKenna & S.K. Bell, 1997: 370
5 Genus †Takracetus Gingerich, Arif & Clyde, 1995
Ref: M.C. McKenna & S.K. Bell, 1997: 370
6 Genus †Gaviacetus Gingerich, Arif & Clyde, 1995
Ref: M.C. McKenna & S.K. Bell, 1997: 370
7 Subfamily †Pakicetinae Gingerich & Russell, 1990
see Family Pakicetidae Thewissen et al., 1996
Ref: M.C. McKenna & S.K. Bell, 1997: 370
8 Subfamily †Protocetinae Stromer, 1908
see Family Protocetidae Stromer, 1908
Ref: M.C. McKenna & S.K. Bell, 1997: 370