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Protohippus gidleyi

Mammalia - Perissodactyla - Equidae

Discussion

type locality is 18554

Taxonomy
Protohippus gidleyi was named by Hulbert (1988). Its type specimen is UF 62473, a set of teeth (assoc. R P2-M3 and L P2-Ml.), and it is a 3D body fossil.

Synonymy list
YearName and author
1988Protohippus gidleyi Hulbert, Jr. p. 294 figs. 22C-22F, 24-25
1998Protohippus gidleyi MacFadden p. 550
1998Protohippus gidleyi MacFadden and Dobie p. 149 fig. 1
2006Protohippus gidleyi Hulbert and Whitmore p. 17

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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()
infraorderCynodontia()
RankNameAuthor
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
orderPerissodactyla()
suborderLophodontomorpha
infraorderEuperissodactyla
Hippomorpha
superfamilyEquoidea
familyEquidae
subfamilyEquinaeSteinmann and Döderlein 1890
tribeEquini
genusProtohippus()
speciesgidleyi

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
R. C. Hulbert 1988Protohippus intermediate in size between P.perditus and P. supremus, with toothrow lengths of 125 to 135 mm. Unworn molar crown height about 58 mm. Protocones of P3 and P4 generally isolated for uppermost 20% of crown, then connected to protoselene at MSCHs of 30 to 40 mm. M3 protocone also often isolated until moderate wear-stages, but may connect earlier. P2, M1, and M2 protocones generally isolated only in very early wear-stages. Protocone of P3-M2 large, elongate; on M12 connected to hypocone in latest wear-stages. Anterostyle of P2 reduced. Lower cheekteeth similar to those of P. supremus but with more expanded metaconid-metastylid complex, more persistent lingual flexids, and less prominent protostylids. Paraconid of p2 and dp2 less flattened than in P. supremus. Ectostylid of dp2-dp4 rudimentary.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingsubf
Diet: grazersubf
Diet 2: browsersubf
Created: 2005-08-31 14:56:53
Modified: 2005-08-31 16:56:53
Source: subf = subfamily, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Carroll 1988, Hendy et al. 2009, Ji et al. 2002, MacFadden 1998

Age range: base of the Clarendonian to the top of the Miocene or 13.60000 to 5.33300 Ma

Collections (16 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (Florida) Protohippus gidleyi (18574)
Clarendonian13.6 - 10.3USA (Nebraska) Protohippus gidleyi (18135 18227 18458 18496)
Late/Upper Clarendonian13.6 - 10.3USA (Florida) Protohippus gidleyi (18554)
Hemphillian10.3 - 4.9USA (Florida) Protohippus gidleyi (18560 18563 18601)
Hemphillian10.3 - 4.9USA (Kansas) Protohippus gidleyi (18237 18415)
Hemphillian10.3 - 4.9USA (Texas) Protohippus gidleyi (18072)
Hemphillian10.3 - 4.9USA (Nebraska) Protohippus gidleyi (18086)
Hemphillian10.3 - 4.9USA (Alabama) Protohippus gidleyi (18559)
Hemphillian10.3 - 4.9Costa Rica (Puntarenas) Protohippus gidleyi (144596)
early Early Hemphillian - late Early Hemphillian10.3 - 4.9USA (Florida) Protohippus gidleyi (18539)