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Hexobelomeryx fricki

Mammalia - Antilocapridae

Taxonomy
Hexobelomeryx fricki was named by Furlong (1941) [genotype]. Its type specimen is CIT 2780, a partial skull (a frontlet with horn cores partially preserved on both sides), and it is a 3D body fossil. Its type locality is Yepomera, which is in a Hemphillian terrestrial horizon in Mexico. It is the type species of Hexobelomeryx.

Synonymy list
YearName and author
1941Hexobelomeryx fricki Furlong p. 27 figs. Plate 1, figures 2, 4, 5; plate 2

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Eugnathostomata
Teleostomi(Bonaparte 1836)
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
subfamilyAntilocaprinae
genusHexobelomeryx
speciesfricki

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.

Hexobelomeryx fricki Furlong 1941
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Diagnosis
ReferenceDiagnosis
E. L. Furlong 1941The horn cores are not supraorbital as in Antilocapra americana and Stockoceros; only the anterior part of the base reaches above the posterior part of the orbit. The horn core is broad anteroposteriorly above the solid frontal base. Rising from a common base is a fork with two prongs or tines, and in addition a third prong, which usually projects anteriorly, sometimes posteriorly. "The cleft between the tines of the fork is narrower than that between the fork and the third prong. The,bottom of the cleft between the tines has a variable position above the base of the horn core, sometimes well above, at other times only a relatively short distance above. Of the three prongs, the anterior shows the largest cross section; the remaining two have cross sections of subequal size. When viewed.from above, the middle prong is.seen to project inward farther than either the anterior or the posterior prong.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilep
Life habit: ground dwellingf
Diet: browserf
Diet 2: grazerf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-31 16:51:41
Source: f = family, o = order, subc = subclass, subp = subphylum, p = phylum
References: Lillegraven 1979, Kiessling 2004, Nowak 1991, Carroll 1988, Nowak 1999

Age range: base of the Hemphillian to the top of the Blancan or 9.40000 to 1.40000 Ma

Collections (11 total)


Time interval Ma Country or state Original ID and collection number
Hemphillian9.4 - 4.7Mexico (Hidalgo) Hexobelomeryx fricki (212307)
Hemphillian9.4 - 4.7Mexico (Jalisco) Hexobelomeryx fricki (189790)
Hemphillian9.4 - 4.7Mexico (Guanajuato) Hexobelomeryx fricki (175257) Hexobelomeryx sp. (18718)
Late/Upper Hemphillian9.4 - 4.7Mexico (Guanajuato) Antilocapridae indet. (18740) Hexobelomeryx fricki (18713) Hexobelomeryx sp. (18737)
Late/Upper Hemphillian9.4 - 4.7Mexico (Chihuahua) Hexobelomeryx fricki (18734 type locality: 18755)
Blancan4.7 - 1.4Mexico (Guanajuato) Antilocapridae indet. (20077)
Blancan4.7 - 1.4Mexico (Hidalgo) Hexobelomeryx fricki (20079)