Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Miohippus gemmarosae

Mammalia - Perissodactyla - Equidae

Taxonomy
Miohippus gemmarosae was named by Osborn (1918). Its type specimen is AMNH 13808, a partial skull (Upper teeth and skull fragments), and it is a 3D body fossil.

Synonymy list
YearName and author
1918Miohippus gemmarosae Osborn p. 66 figs. Plates 3.7, 4.1,2,3,4,9. Text Figs. 46, 47
1940Miohippus gemmarosae Stirton p. 172
1998Miohippus gemmarosae MacFadden p. 544

Is something missing? Join the Paleobiology Database and enter the data

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
subfamilyAnchitheriinae()
genusMiohippus
speciesgemmarosae

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.

†Miohippus gemmarosae Osborn 1918
show all | hide all
Diagnosis
ReferenceDiagnosis
H. F. Osborn 1918(Matthew, 1913) (1) Same size as Miohippus annectens and M. anceps. (2) Premaxillary alveoli
indicate incisors and canine of exceptionally large size; (3) p2 of less transverse but greater antero-posterior diameter than M. anceps and M. annectens; (4) p2 relatively narrow and elongate, p1 relatively large; (5) metaloph not united with ectoloph; (6) premolars with somewhat larger parastyle, especially on p2, than in M. annectens; (7) no internal cingula, no intermediate basal cusps; (8) hypostyle better developed on true molars.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-31 16:55:50
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Carroll 1988, Ji et al. 2002, Lillegraven 1979, Nowak 1991

Age range: base of the Monroecreekian to the top of the Harrisonian or 26.30000 to 18.50000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Arikareean29.5 - 18.5USA (Idaho) Miohippus gemmarosae (17586)
Arikareean29.5 - 18.5USA (Montana) Miohippus sp. (17700)
Monroecreekian26.3 - 24.8USA (South Dakota) Miohippus gemmarosae (17545)
Harrisonian24.8 - 18.5USA (South Dakota) Miohippus gemmarosae (17451)
Harrisonian24.8 - 18.5Canada (Saskatchewan) Miohippus gemmarosae (17758)