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Pliohippus

Mammalia - Perissodactyla - Equidae

Synonyms
Synonymy list
YearName and author
1874Pliohippus Marsh
1892Pliohippus gracilis Marsh p. 347
1902Pliohippus Hay p. 618
1902Pliohippus gracilis Hay p. 618
1907Pliohippus Gidley p. 867
1913Pliohippus Scott p. 290
1918Kalobatippus gracilis Osborn p. 71 figs. Text Figs. 49, 51
1930Pliohippus Matthew and Stirton
1940Pliohippus Stirton
1940Anchitherium gracilis Stirton p. 174
1955Pliohippus Quinn p. 13
1969Pliohippus Webb
1975Pliohippus Forsten p. 48
1988Pliohippus Carroll
1989Pliohippus Hulbert, Jr.
1989Pliohippus Prothero and Schoch p. 532
1995Pliohippus Kelly p. 14
1996Pliohippus Prado and Alberdi p. 676
1998Kalobatippus gracilis MacFadden
1998Pliohippus MacFadden p. 550
2014Pliohippus Ferrusquía-Villafranca et al. p. 204

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyEquinae
tribeEquini
genusPliohippus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Pliohippus Marsh 1874
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Subg. †Pliohippus (Astrohippus) Stirton 1940
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Subg. †Pliohippus (Pliohippus) Stirton 1940
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Pliohippus bakeri Azzaroli 1988
Pliohippus coalingensis Merriam 1914
Pliohippus fossulatus Cope 1893
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Invalid names: Protohippus pachyops Cope 1893 [synonym]
Pliohippus mirabilis Leidy 1858
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Invalid names: Merychippus campestris Gidley 1907 [synonym]
Pliohippus nobilis Osborn 1918
Pliohippus pernix Marsh 1874
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Invalid names: Pliohippus lullianus Troxell 1916 [synonym], Pliohippus robustus Marsh 1874 [synonym]
Pliohippus potosinus Ferrusquía-Villafranca et al. 2014
Pliohippus proversus Merriam 1916
Pliohippus tantalus Merriam 1913
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Invalid names: Pliohippus fairbanksi Merriam 1915 [synonym]
Pliohippus tehonensis Merriam 1915
Invalid names: Pliohippus gracilis Marsh 1892 [nomen dubium]
Diagnosis
ReferenceDiagnosis
J. H. Quinn 1955sence of malar fossa; strongly curved upper cheek teeth; flat- tened entoconid with shallow valleys, prominent ribs and reduced styles with the parastyles of the premolars little or no larger than those of the molars; small, round to oval protocones; postprotoconal valleys shallow; hypoconal grooves partly closed; metaconids and metastylids round- ed, not widely separated, and nearly equal in size; no· pli caballinds; parastylids faint and oriented as in Hippodon; proto- conids and hypoconids transversely broad and markedly rounded; metapodials short, lateral digits present in earlier species but probably lost in later species.