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Texoceros altidens

Mammalia - Antilocapridae

Taxonomy
Merycodus altidens was named by Matthew (1924). Its type locality is Aphelops Draw Quarries, which is in a Hemphillian terrestrial horizon in the Snake Creek Formation of Nebraska.

It was recombined as Capromeryx altidens by Hesse (1935), Hesse (1936), Stirton (1938); it was recombined as Texoceros altidens by Frick (1937), Dalquest (1983), Janis and Manning (1998).

Synonyms
Synonymy list
YearName and author
1924Merycodus altidens Matthew
1928Dorcameryx optimae Reed and Longnecker
1935Capromeryx altidens Hesse p. 308
1935Capromeryx texanus Hesse p. 311 figs. 4, 5B
1936Capromeryx altidens Hesse
1937Texoceros altidens Frick
1937Texoceros texanus Frick
1938Capromeryx altidens Stirton
1983Texoceros altidens Dalquest
1998Texoceros altidens Janis and Manning

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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
—Artiodactylamorpha
—Artiodactyla()
—Ruminantiamorpha
—Ruminantia(Scopoli 1777)
—Pecora()
familyAntilocapridae
genusTexoceros
speciesaltidens()

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.

†Texoceros altidens Matthew 1924
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Invalid names: Capromeryx texanus Hesse 1935 [synonym], Dorcameryx optimae Reed and Longnecker 1928 [synonym]
Diagnosis
ReferenceDiagnosis
C. J. Hesse 1935 (Capromeryx texanus)Intermediate in size between Merycodus necatus and Capromeryx altidens; jaw not shortened as in C. minor and C. mexicana (Chandler, 1916, p. 115); premolars not as high crowned as in the known species of Capromeryx, but higher crowned than in any described species of iMerycodus; ramus slender in outline as in Merycodus; but slightly larger.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserg
Reproduction: viviparoussubc
Created: 2009-01-04 10:45:04
Modified: 2009-01-04 12:45:04
Source: g = genus, f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Lillegraven 1979, Nowak 1999, Hendy et al. 2009, Solounias and Moelleken 1993, Nowak 1991

Age range: base of the Hemphillian to the top of the Miocene or 10.30000 to 5.33300 Ma

Collections (6 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (California) Capromeryx altidens (19376)
Hemphillian10.3 - 4.9USA (Texas) Capromeryx texanus (178104) Texoceros altidens (18097)
Hemphillian10.3 - 4.9USA (Nebraska) Texoceros altidens (type locality: 18033 18258 18323)