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Heteromeryx

Mammalia - Protoceratidae

Taxonomy
Heteromeryx was named by Matthew (1905). It is not extant.

It was assigned to Hypertragulidae by Matthew (1905); to Leptomerycinae by Scott (1940); and to Protoceratidae by Carroll (1988), Prothero (1998) and Prothero and Ludtke (2007).

Species
H. dispar

Synonymy list
YearName and author
1905Heteromeryx Matthew
1940Heteromeryx Scott p. 554
1988Heteromeryx Carroll
1998Heteromeryx Prothero p. 434
2007Heteromeryx Prothero and Ludtke 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
RankNameAuthor
—Mammaliaformes
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Ruminantiamorpha
familyProtoceratidae
genusHeteromeryx

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.

G. †Heteromeryx Matthew 1905
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†Heteromeryx dispar Matthew 1905
Diagnosis
ReferenceDiagnosis
W. D. Matthew 1905Skull rather short, orbits complete behind, situate over the posterior molars, muzzle elongate, nasals considerably reduced. Teeth very short crowned, molars with heavy internal cingula and rudimentary mesos1!yle. Four premolars, the first small, simple, with lol)g diastemata before and behind it, the others much as in Leptomeryx . Ulna with well-developed shaft, co- ossified with radius along its entire length. Manus functionally tetradactyl, with four separate digits as in Leptomeryx. Magnum and cuneiform fused. Distal end of fibula separate from tibia; shaft a small vestigial spine. Pes didactyl, with separate metatarsals, cuboid and navicular distinct, ecto- and meso-cuneiform fused. Ungual phalanges short and compressed.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-08-31 14:39:46
Modified: 2009-01-07 18:24:42
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Lillegraven 1979, Carroll 1988, Prothero 1998, Hendy et al. 2009

Age range: base of the Chadronian to the top of the Duchesnean or 37.20000 to 37.00000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Duchesnean39.7 - 37.0USA (Texas) H. dispar (16829 16830)
Chadronian37.2 - 33.9USA (Nebraska) H. dispar (16941)
Chadronian37.2 - 33.9USA (South Dakota) H. dispar (16969 16978)