Concise hierarchy

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

Subsequent positions

Hippomorpha (Suborder) Wood, 1937

Original entries

Questionably †Acritohippus (Genus) Kelly, 1995
Questionably †Anchitherium (Genus) von Meyer, 1844
Questionably †Archaeohippus (Genus) Gidley, 1906
Questionably †Astrohippus (Genus) Stirton, 1940
Questionably †Calippus (Genus) Matthew & Stirton, 1930
Questionably †Cormohipparion (Genus) Skinner & MacFadden, 1977
Questionably †Dinohippus (Genus) Quinn, 1955
Questionably †Eohippus (Genus) Marsh, 1876
Questionably †Epihippus (Genus) Marsh, 1878
Questionably Equus (Genus) Linnaeus, 1758
Questionably †Haplohippus (Genus) McGrew, 1953
Questionably †Heteropliohippus (Genus) Kelly, 1995
Questionably †Hipparion (Genus) de Christol, 1832
Questionably Hippidion (Genus) Owen, 1869
Questionably †Hypohippus (Genus) Leidy, 1858
Questionably †Hyracotherium (Genus) Owen, 1840
Questionably †Kalobatippus (Genus) Osborn, 1915
Questionably †Megahippus (Genus) McGrew, 1938
Questionably †Merychippus (Genus) Leidy, 1857
Questionably †Mesohippus (Genus) Marsh, 1875
Questionably †Miohippus (Genus) Marsh, 1874
Questionably †Nannippus (Genus) Matthew, 1926
Questionably †Neohipparion (Genus) Gidley, 1903
Questionably †Onohippidion (Genus) Boule & Thevin, 1920
Questionably †Onohippidium (Genus) Moreno, 1891
Questionably †Orohippus (Genus) Marsh, 1872
Questionably †Parahippus (Genus) Leidy, 1858
Questionably †Parapliohippus (Genus) Kelly, 1995
Questionably †Pliohippus (Genus) Marsh, 1874
Questionably †Proboscidipparion (Genus) Sefve, 1927
Questionably †Protohippus (Genus) Leidy, 1858
Questionably †Pseudhipparion (Genus) Ameghino, 1904
Questionably †Sinohippus (Genus) Zhai, 1962
Questionably †Stylohipparion (Genus) van Hoepen, 1932

Current position

Hippomorpha (Suborder) Wood, 1937

Ref: C.J. Burgin et al., 2020: table 2 (p. 27); Benton, 2015: 445.

Alternative positions

Equoidea (Superfamily) (Gray, 1821) Hay, 1902	Ref: R.L. Carroll, 1988: App. (p. 644).
Hippomorpha (Superfamily)	Ref: M.J. Benton, 2015: 445.
Perissodactyla (Order) Owen, 1848	Ref: D.E. Wilson & D.M. Reeder, 2011: 59.

Historical positions

Hippomorpha (Suborder) Wood, 1937	Ref: C.J. Burgin et al., 2020: table 2 (p. 27).
Hippomorpha (Superfamily)	Ref: M.J. Benton, 2015: 445.
Perissodactyla (Order) Owen, 1848	Ref: D.E. Wilson & D.M. Reeder, 2011: 59.
Hippomorpha (Superfamily)	Ref: M.J. Benton, 2005: 402.
Perissodactyla (Order) Owen, 1848	Ref: P. Grubb, 2005: 629.
Hippomorpha (Suborder) Wood, 1937	Ref: M.C. McKenna & S.K. Bell, 1997: 469.
Perissodactyla (Order) Owen, 1848	Ref: 1995
Perissodactyla (Order) Owen, 1848	Ref: P. Grubb, 1993: 369; 6.
Perissodactyla (Order) Owen, 1848	Ref: G.B. Corbet & J.E. Hill, 1991: 123.
Hippomorpha (Suborder) Wood, 1937	Ref: B. Gardiner et al., 1989: 304.
Equoidea (Superfamily) (Gray, 1821) Hay, 1902	Ref: R.L. Carroll, 1988: App. (p. 644).
Perissodactyla (Order) Owen, 1848	Ref: A.F. DeBlase, 1982: 1057.
Perissodactyla (Order) Owen, 1848	Ref: T.I. Storer et al., 1979
Equoidea (Superfamily) (Gray, 1821) Hay, 1902	Ref: R. Altevogt et al., 1973 (1972): 702.
Hippomorpha (Suborder) Wood, 1937	Ref: G.G. Simpson, 1945

Number of Subtaxa

2026	Available in Systema Naturae 2000	1g;7s;22ss; ‡1g;1s;3ss; †30g;56s;5ss
1989-present	Systema Naturae 2000: 26 Jan 2015	[1g;7s;22ss; ‡1g; †30g]
2011	D.E. Wilson & D.M. Reeder: 59	1g;7s
2005	P. Grubb: 633	[1g;7s;22ss; ‡1s;2ss]
1997	M.C. McKenna & S.K. Bell	[1g; ‡1g; †30g]
1993	P. Grubb	1g;9[8]s; ‡[1s]
1991	G.B. Corbet & J.E. Hill	[1g];7[8]s; ‡[1s]
1982	A.F. DeBlase	1g;7s(; ‡1s)