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Equus niobrarensis

Mammalia - Perissodactyla - Equidae

Taxonomy
Equus niobrarensis was named by Hay (1913). Its type specimen is USNM 4999, a skull, and it is a 3D body fossil.

It was synonymized subjectively with Equus excelsus by Barbour and Schultz (1937); it was synonymized subjectively with Equus scotti by Lundelius (1984) and Winans (1989); it was synonymized subjectively with Equus laurentius by Harris (1993).

Synonyms
Synonymy list
YearName and author
1913Equus niobrarensis Hay p. 576
1915Equus hatcheri Hay p. 527
1939Equus niobrarensis Hibbard
1960Equus niobrarensis Stephens
1980Equus niobrarensis Kurten and Anderson p. 290
1995Equus niobrarensis Hulbert, Jr.
2007Equus niobrarensis Morgan and Rinehart p. 44

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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
classMammalia
RankNameAuthor
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyEquinae
tribeEquini
genusEquus
speciesniobrarensis

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.

†Equus niobrarensis Hay 1913
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Invalid names: Equus hatcheri Hay 1915 [synonym]
Diagnosis
ReferenceDiagnosis
O. P. Hay 1915 (Equus hatcheri)A large Pleistocene horse, which resembles closely the larger varieties of Equus caballus, but which has a broader skull, a heavier lower jaw, and certain differences in the teeth.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingg
Diet: grazerg
Reproduction: viviparoussubc
Created: 2005-08-31 14:57:30
Modified: 2009-01-04 13:02:31
Source: g = genus, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Nowak 1999, Carroll 1988, Ji et al. 2002, Hendy et al. 2009

Age range: base of the Irvingtonian to the top of the Rancholabrean or 1.80000 to 0.01200 Ma

Collections (15 total)


Time interval Ma Country or state Original ID and collection number
Pleistocene2.588 - 0.0117Mexico (Jalisco) Equus niobrarensis (20285)
Irvingtonian1.8 - 0.3USA (Kansas) Equus niobrarensis (20142 20165 20291 20332 20353 20390)
Irvingtonian1.8 - 0.3USA (Oklahoma) Equus niobrarensis (20309)
Irvingtonian - Rancholabrean1.8 - 0.012USA (Kansas) Equus niobrarensis (20492)
Late/Upper Pleistocene (late glacial)0.129 - 0.0117Canada (Saskatchewan) Equus niobrarensis (20317)
Late/Upper Pleistocene0.129 - 0.0117USA (Oklahoma) Equus hatcheri (216271)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117Canada (Saskatchewan) Equus niobrarensis (20640)
Late/Upper Pleistocene (interglacial)0.129 - 0.0117Canada (Alberta) Equus niobrarensis (20615 20648)
Late/Upper Pleistocene (high glacial)0.129 - 0.0117USA (New Mexico) Equus niobrarensis (76060)