Concise hierarchy

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

Phylogeny

Total clade		Ref: M.A. O'Leary et al., 2013: table S4 (p. 100: "Total clade of Placentalia").
Branch-based clade		Ref: M.A. O'Leary et al., 2004: 494 ("stem-based taxa").

First representative

†Kulbeckia kulbecke Nessov, 1993		Ref: M.A. O'Leary et al., 2013: table S2 (p. 85).
†Uchkudukodon nessovi (McKenna et al., 2000)		Ref: M.A. O'Leary et al., 2013: table S2 (p. 85).

Defined by included taxon (and all taxa more closely related to it than to the excluded taxon)

Elephas maximus Linnaeus, 1758

Ref: M.A. O'Leary et al., 2004: 494.

Defined by excluded taxon

Didelphis virginiana Kerr, 1792

Ref: M.A. O'Leary et al., 2004: 494.

Current position

Theria (Clade) Parker & Haswell 1897 [McKenna 1975]

Ref: É.V. Oliveira et al., 2021: fig. 6.

Historical positions

Theria (Clade) Parker & Haswell 1897 [McKenna 1975]	Ref: É.V. Oliveira et al., 2021: fig. 6.
Mammalia (Clade) Linnaeus 1758 [Rowe 1988], nom. cl. inval.	Ref: L.M. Carneiro et al., 2018: fig. 5. [rough position] [inferred]
Theria (Clade) Parker & Haswell 1897 [McKenna 1975]	Ref: M.A. O'Leary et al., 2013: table S4 (p. 100). [implicit]
Theria (Clade) Parker & Haswell 1897 [McKenna 1975]	Ref: H. Nishihara et al., 2006: 9930; 9933. [indirect]
Theria (Infralegion) Parker & Haswell, 1897	Ref: M.J. Benton, 2005: 400, box 10.3. [alternative name]
Theria (Clade) Parker & Haswell 1897 [McKenna 1975]	Ref: M.A. O'Leary et al., 2004: fig. 28.2.

Number of Subtaxa

1989-present	Systema Naturae 2000	18o
2006	H. Nishihara et al.: 9929	18o