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Pliohippus

Mammalia - Perissodactyla - Equidae

Synonyms
Synonymy list
YearName and author
1874Pliohippus Marsh
1892Pliohippus gracilis Marsh p. 347
1907Pliohippus Gidley p. 867
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
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()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
RankNameAuthor
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
orderPerissodactyla()
suborderLophodontomorpha
infraorderEuperissodactyla
Hippomorpha
superfamilyEquoidea
familyEquidae
subfamilyEquinaeSteinmann and Döderlein 1890
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.

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.