Concise hierarchy

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

Subsequent positions

Ameridelphia (Magnorder) Szalay, 1982

Ref: M.C. McKenna & S.K. Bell, 1997: 73.

Original entries

Questionably †Argyrolagoidea (Superfamily) Ameghino, 1904
Questionably Caenolestoidea (Superfamily) Trouessart, 1898
Questionably †Caroloameghinioidea (Superfamily) Ameghino, 1901
Questionably †Polydolopoidea (Superfamily) Ameghino, 1897

Current position

Marsupialia (Cohort) Jameson, 1818

Ref: M.J. Benton, 2015: 443; Oliveira et al., 2021: fig. 6.

Alternative positions

Ameridelphia (Magnorder) Szalay, 1982	Ref: M.J. Benton, 2005: 400.
Ameridelphia (Superorder) Szalay, 1982	Ref: Z. Kielan-Jaworowska et al., 2004 (alt.): table 1.1 (p. 15). [new position]
Hesperometatheria (Cohort)
Mammalia (Class) Linnaeus, 1758	Ref: A.L. Gardner, 1993: 25.
Marsupialia (Clade) Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]	Ref: É.V. Oliveira et al., 2021: fig. 6; Oliveira et al., 2021: fig. 6. [inferred rank]
Marsupialia (Infraclass) Jameson, 1818	Ref: D.E. Wilson & D.M. Reeder, 2011: 56.
Marsupialia (Superorder) Jameson, 1818	Ref: A.F. DeBlase, 1982: 1019.
Metatheria (Infraclass) Huxley, 1880	Ref: C.J. Burgin et al., 2020: table 2 (p. 26).

Historical positions

Marsupialia (Clade) Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]	Ref: É.V. Oliveira et al., 2021: fig. 6.
Metatheria (Infraclass) Huxley, 1880	Ref: C.J. Burgin et al., 2020: table 2 (p. 26).
Marsupialia (Clade) Jameson 1818 [O'Leary, Allard, Novacek, Meng & Gatesy 2004]	Ref: L.M. Carneiro et al., 2018: fig. 5. [inferred rank]
Marsupialia (Cohort) Jameson, 1818	Ref: M.J. Benton, 2015: 443.
Marsupialia (Infraclass) Jameson, 1818	Ref: D.E. Wilson & D.M. Reeder, 2011: 56.
Theria (Subclass) Parker & Haswell, 1897	Ref: A.L. Gardner, 2005: 19. [implicit]
Ameridelphia (Magnorder) Szalay, 1982	Ref: M.J. Benton, 2005: 400.
Ameridelphia (Superorder) Szalay, 1982	Ref: Z. Kielan-Jaworowska et al., 2004 (alt.): table 1.1 (p. 15).
Ameridelphia (Superorder) Szalay, 1982	Ref: Z. Kielan-Jaworowska et al., 2004: tables 1.2 (p. [17]), 12.1 (p. [443]). [new position]
Ameridelphia (Magnorder) Szalay, 1982	Ref: M.C. McKenna & S.K. Bell, 1997: 73. [new position]
Mammalia (Class) Linnaeus, 1758	Ref: A.L. Gardner, 1993: 25; 4.
Marsupialia (Superorder) Jameson, 1818	Ref: A.F. DeBlase, 1982: 1019.

Number of Subtaxa

2025	Available in Systema Naturae 2000	1f;3g;6s;7ss; †3f;26g;4s
1989-present	Systema Naturae 2000: 1 Apr 2022	[1f;3g;6s;7ss; †3f;26g]
2020	C.J. Burgin et al.: table 2 (p. 26)	[1f]
2015	M.J. Benton: 443	[1f; †2f]
2011	D.E. Wilson & D.M. Reeder: 56	1f
2005	A.L. Gardner	[1f;3g;6s;7ss]
1997	M.C. McKenna & S.K. Bell	[1f;3g; †12f;40g]
1993	A.L. Gardner	[1f];3g;5s
1984b		1f
1982	A.F. DeBlase	1f;3g
1977c		1f