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Equus pseudaltidens

Mammalia - Perissodactyla - Equidae

Synonyms
  • Onager altidens was named by Quinn (1957) [several specimens listed as type, "all believed to belong to one individual, approximately three years old."]. Its type specimen is BEG 31186-3, -4, -7, -10, -24, -34, -35, -36, -37, a partial skeleton (Right maxillary, with worn D.P. 2-4, unerupted P.2-4, M.1-2 (B.E.G. no. 31186-35); right and left lower jaws with l.l, D.l.2, D.P.2-4, M.1-2, P.2-4 un- erupted ), and it is a 3D body fossil. Its type locality is Powers Ranch, Goliad County site 20, which is in a Pleistocene terrestrial horizon in Texas.

    It was synonymized subjectively with Equus hemionus by Kurten and Anderson (1980); it was synonymized subjectively with Equus francisci by Winans (1989); it was replaced with Equus pseudaltidens by Hulbert (1995).
Synonymy list
YearName and author
1957Onager altidens Quinn p. 16 figs. PI. I; Pl. V, fig 3; Pl. VII, figs. 1, 2
1995Equus pseudaltidens Hulbert, Jr.

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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
speciespseudaltidens

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 pseudaltidens Hulbert, Jr. 1995
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Invalid names: Onager altidens Quinn 1957 [replaced]
Diagnosis
ReferenceDiagnosis
J. H. Quinn 1957 (Onager altidens)Size slightly larger than Onager kiang, teeth extremely hypsodont exceeding E. caballus somewhat and Asinus considerably; upper teeth curved both transversely and anteroposteriorly; protocones elongated, especially anteriorly; metaconid-metastylid valley V-shaped on premolars; upper and lower third molars greatly reduced anteroposteriorly; limbs longer and more slender than those of Onager kiang or Onager onager.