Concise hierarchy

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

Subsequent positions

Theria (Supercohort) Parker & Haswell, 1897

Ref: M.C. McKenna & S.K. Bell, 1997: 51.

Original entries

Questionably †Asiatheriidae (Family) Trofimov & Szalay, 1994

Current position

Marsupialiformes (Clade) Vullo, Gheerbrant, de Muizon & Néraudeau, 2009

Ref: K.D. Rose, 2006: table 1.2 (p. [9]); Oliveira et al., 2021: fig. 6. [indirect]

Alternative positions

Ameridelphia (Superorder) Szalay, 1982	Ref: Z. Kielan-Jaworowska et al., 2004: table 1.2 (p. [17]). [new position]
Marsupialiformes (Supercohort) Vullo, Gheerbrant, de Muizon & Néraudeau, 2009	Ref: K.D. Rose, 2006: table 1.2 (p. [9]); Carneiro et al., 2018: fig. 5. [indirect]
Metatheria (Infraclass) Huxley, 1880	Ref: K.D. Rose, 2006: table 1.2 (p. [9]).
Theria (Supercohort) Parker & Haswell, 1897	Ref: M.C. McKenna & S.K. Bell, 1997: 51. [new position]

Historical positions

Metatheria (Infraclass) Huxley, 1880	Ref: K.D. Rose, 2006: table 1.2.
Ameridelphia (Superorder) Szalay, 1982	Ref: Z. Kielan-Jaworowska et al., 2004: tables 1.2 (p. [17]), 12.1 (p. [443]). [new position]
Theria (Supercohort) Parker & Haswell, 1897	Ref: M.C. McKenna & S.K. Bell, 1997: 51. [new position]
Mammalia (Class) Linnaeus, 1758	Ref: 1995

Number of Subtaxa

2025	Available in Systema Naturae 2000	†1f;1g;1s
1989-present	Systema Naturae 2000: 24 Apr 2022	[; †1f;1g;1s]
2004	Z. Kielan-Jaworowska et al.: table 12.1 (p. [443])	[; †1f;2g;2s]
1997	M.C. McKenna & S.K. Bell	[; †1f;1g]