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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()
—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
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyEquinae
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.

†Protohippus gidleyi Hulbert, Jr. 1988
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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
Reproduction: viviparoussubc
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, Hendy et al. 2009, Carroll 1988, MacFadden 1998, Lillegraven 1979, Ji et al. 2002

Age range: base of the Hemphillian to the top of the Clarendonian or 10.30000 to 9.40000 Ma

Collections (16 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (Florida) Protohippus gidleyi (18574)
Clarendonian12.5 - 9.4USA (Nebraska) Protohippus gidleyi (18135 18227 18458 18496)
Late/Upper Clarendonian12.5 - 9.4USA (Florida) Protohippus gidleyi (18554)
Hemphillian10.3 - 4.9USA (Texas) Protohippus gidleyi (18072)
Hemphillian10.3 - 4.9USA (Alabama) Protohippus gidleyi (18559)
Hemphillian10.3 - 4.9USA (Kansas) Protohippus gidleyi (18237 18415)
Hemphillian10.3 - 4.9USA (Nebraska) Protohippus gidleyi (18086)
Hemphillian10.3 - 4.9Costa Rica (Puntarenas) Protohippus gidleyi (144596)
Hemphillian10.3 - 4.9USA (Florida) Protohippus gidleyi (18560 18563 18601)
early Early Hemphillian - late Early Hemphillian10.3 - 4.9USA (Florida) Protohippus gidleyi (18539)