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Miohippus quartus

Mammalia - Perissodactyla - Equidae

Taxonomy
Miohippus quartus was named by Osborn (1918). Its type specimen is AMNH 7267, a partial skeleton (A skull and fragments of a skeleton), and it is a 3D body fossil.

Synonymy list
YearName and author
1918Miohippus quartus Osborn p. 62 figs. Plates 3.8, 4.6,8, 5.2. Text Figs. 40, 41
1940Miohippus quartus Stirton p. 172

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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
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyAnchitheriinae()
genusMiohippus
speciesquartus

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 quartus Osborn 1918
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Diagnosis
ReferenceDiagnosis
H. F. Osborn 1918 (Matthew, 1913) (1) About one-seventh shorter and with a muzzle relatively•more slender than the type of M. equiceps. (2) Dentition about one-seventh smaller than that of M. equiceps; (3) molar teeth relatively wider transversely than in M. equicepa or M. brachywphua; (4) no internal cingulum; (5) m3 relatively smaller than M. equiceps or M. brachylophus; (6) incisors of smaller size; (7) canines of much smaller size than in M. equiceps, possibly a sexual character. (8) Infraorbital border of orbit above anterior part of m2