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Dinohippus interpolatus

Mammalia - Perissodactyla - Equidae

Taxonomy
Hippidium interpolatum was named by Cope (1893) [also said to be 1886, and also said originally to have been placed in Hippidion]. It is a 3D body fossil. Its type locality is Goodnight's, which is in a Hemphillian terrestrial horizon in the Goodnight Beds Formation of Texas.

It was recombined as Hippidion interpolatum by Hay (1902); it was recombined as Protohippus interpolatus by Gidley (1903), Matthew (1909); it was recombined as Pliohippus interpolatus by Trouessart (1905), Gidley (1907), Osborn (1918), Matthew and Stirton (1930), Savage (1941); it was recombined as Pliohippus (Pliohippus) interpolatus by Stirton (1940); it was considered a nomen dubium by Azzaroli (1988), Macdonald (1992); it was recombined as Dinohippus interpolatus by Quinn (1955), Webb (1969), Dalquest (1983), Kelly and Lander (1988), Kelly (1995), Prado and Alberdi (1996), MacFadden (1998), Kelly (1998), Kelly (2000).

Synonymy list
YearName and author
1893Hippidium interpolatum Cope p. 42
1902Hippidion interpolatum Hay p. 619
1903Protohippus interpolatus Gidley
1905Pliohippus interpolatus Trouessart
1907Pliohippus interpolatus Gidley
1909Protohippus interpolatus Matthew
1918Pliohippus interpolatus Osborn p. 158 figs. Plates 24.6, 25.13. Text Fig. 126
1930Pliohippus interpolatus Matthew and Stirton
1940Pliohippus (Pliohippus) interpolatus Stirton p. 192
1941Pliohippus interpolatus Savage
1955Dinohippus interpolatus Quinn p. 43
1969Dinohippus interpolatus Webb
1983Dinohippus interpolatus Dalquest
1988Dinohippus interpolatus Kelly and Lander
1995Dinohippus interpolatus Kelly p. 26
1996Dinohippus interpolatus Prado and Alberdi p. 676
1998Dinohippus interpolatus Kelly
1998Dinohippus interpolatus MacFadden p. 551
2000Dinohippus interpolatus Kelly

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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
genusDinohippus
speciesinterpolatus()

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.

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Diagnosis
ReferenceDiagnosis
H. F. Osborn 1918(Cope, 1893, Osborn, 1918) (1) Distinguished from corresponding teeth of Prowhippus by the small
size of protocone and hypocone; (2) protocone uniting with protoconule; (3) a pli caballin and crochet fold in prefossette, (4) single enamel fold in postfossette; (5) hypostyle region simple, fossettes relatively large, borders relatively simple; (6) crowns curved transversely but not anteroposteriorly; (7) cement abundant.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingsubf
Diet: browserg
Reproduction: viviparoussubc
Created: 2009-01-04 10:30:04
Modified: 2009-01-04 12:59:11
Source: g = genus, subf = subfamily, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, MacFadden and Cerling 1996, Carroll 1988, Lillegraven 1979, Ji et al. 2002, MacFadden 1998

Age range: base of the Hemphillian to the top of the Blancan or 9.40000 to 1.40000 Ma

Collections (17 total)


Time interval Ma Country or state Original ID and collection number
Hemphillian9.4 - 4.7USA (Kansas) Dinohippus interpolatus (18166 18241 18342)
Hemphillian9.4 - 4.7USA (Texas) Dinohippus interpolatus (18073 18097) Hippidium interpolatum (type locality: 18175)
Hemphillian9.4 - 4.7Mexico (Jalisco) Dinohippus interpolatus (18719)
Hemphillian9.4 - 4.7Mexico (Michoacán) Dinohippus interpolatus (212337)
Hemphillian9.4 - 4.7USA (Colorado) Pliohippus sp. (18495)
Hemphillian9.4 - 4.7USA (New Mexico) Dinohippus interpolatus (19533)
Hemphillian9.4 - 4.7Mexico (Zacatecas) Dinohippus interpolatus (212341)
Hemphillian9.4 - 4.7Mexico (Queretaro) Dinohippus interpolatus (18730)
Hemphillian9.4 - 4.7Mexico (Hidalgo) Dinohippus interpolatus (18746)
Hemphillian9.4 - 4.7Mexico (Guanajuato) Dinohippus interpolatus (175257)
Late/Upper Hemphillian9.4 - 4.7USA (California) Dinohippus interpolatus (19582)
Late/Upper Hemphillian9.4 - 4.7USA (Texas) Dinohippus interpolatus (18340)
Blancan4.7 - 1.4Mexico (Hidalgo) Dinohippus interpolatus (20079)