Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia

Phylogeny

Crown clade

Ref: M.A. O'Leary et al., 2013: table S4 (p. 100: "Node-based crown clade").

First representative

†Sinodelphys szalayi Z.-X. Luo et al., 2003

Ref: M.A. O'Leary et al., 2013: table S2 (p. 85).

Defined by the most recent common ancestor (and all its descendants) of

Marsupialia (Clade) Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]		Ref: T. Rowe, 1988: 247, 251 ("marsupials").
Placentalia (Clade) Owen 1837 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]		Ref: T. Rowe, 1988: 247, 251 ("placentals").

Included, by definition, in node-based clade

Cladotheria (Clade) McKenna 1975		Ref: Z. Kielan-Jaworowska et al., 2004: table 1.1 (p. 14: "Crown Theria").
Holotheria (Clade) Wible, Rougier, Novacek, McKenna & Dashzeveg 1995		Ref: J.R. Wible et al., 1995: 10 ("therians").
Mammalia (Clade) Linnaeus 1758 [Rowe 1988], nom. cl. inval.		Ref: T. Rowe, 1988: 247.
Prototribosphenida (Clade) Wible, Rougier, Novacek, McKenna & Dashzeveg 1995		Ref: J.R. Wible et al., 1995: 9.
Prototribosphenida (Clade) Wible, Rougier, Novacek, McKenna & Dashzeveg 1995		Ref: Z.-X. Luo et al., 2002: 28 ("living therians").
Theriiformes (Clade) Rowe 1988		Ref: T. Rowe, 1988: 251 [Rowe, 1986a].
Trechnotheria (Clade) McKenna 1975		Ref: Z. Kielan-Jaworowska et al., 2004: table 1.1 (p. 14: "Crown Theria").
Trechnotheria (Clade) McKenna 1975		Ref: Z.-X. Luo et al., 2002: 26 ("crown Theria").

Included, by definition, in branch-based clade

Theriimorpha (Clade) Rowe 1993

Ref: T. Rowe, 1993: 139 ("therians").

Excluded, by qualifying clause, from node-based clade

Yinotheria (Clade) Chow & Rich 1982 [Kielan-Jaworowska, Cifelli & Luo 2004]

Ref: Z. Kielan-Jaworowska et al., 2004: 204 ("therians").

Node-based clade

Theria (Clade) Parker & Haswell 1897 [McKenna 1975]		Ref: M.A. O'Leary et al., 2004: 494.
Theria (Supercohort) Parker & Haswell, 1897		Ref: M.C. McKenna & S.K. Bell, 1997: 49 (note 1).

Current position

Boreosphenida (Subclass) Luo, Cifelli & Kielan-Jaworowska, 2001

Ref: M.J. Benton, 2015: 443. [inferred rank] [implicit]

Alternative positions

Mammalia (Clade) Linnaeus 1758 [Rowe 2020]	Ref: É.V. Oliveira et al., 2021: fig. 6.
Mammalia (Clade) Linnaeus 1758 [Rowe 1988], nom. cl. inval.	Ref: M.A. O'Leary et al., 2004: fig. 28.2.
Theriiformes (Clade) Rowe 1988	Ref: T. Rowe, 1988: 251.
Theriimorpha (Clade) Rowe 1993	Ref: M.A. O'Leary et al., 2013: table S4 (p. 100).

Historical positions

Mammalia (Clade) Linnaeus 1758 [Rowe 2020]	Ref: É.V. Oliveira et al., 2021: fig. 6.
Mammalia (Clade) Linnaeus 1758 [Rowe 2020]	Ref: K. de Queiroz et al., 2020: x.
Theriimorpha (Clade) Rowe 1993	Ref: M.A. O'Leary et al., 2013: table S4 (p. 100).
Mammalia (Clade) Linnaeus 1758 [Rowe 1988], nom. cl. inval.	Ref: M.A. O'Leary et al., 2004: fig. 28.2.
Theriiformes (Clade) Rowe 1988	Ref: T. Rowe, 1988: 251, figs. 3, 4.

Number of Subtaxa

1989-present

Systema Naturae 2000

[26o;135f; ‡1o;10f;52g; †30o;282f;4280g]