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Paracosoryx loxoceros

Mammalia - Antilocapridae

Taxonomy
Merycodus loxocerus was named by Furlong (1934) [not 1935]. Its type specimen is CIT 1301, a mandible (right ramus), and it is a 3D body fossil. Its type locality is Tonopah, which is in a Barstovian terrestrial horizon in Nevada.

It was recombined as Cosoryx (Paracosoryx) loxocerus by Frick (1937); it was recombined as Paracosoryx loxocerus by Tedford et al. (1987); it was recombined as Paracosoryx loxoceros by Davis (2007).

Synonymy list
YearName and author
1934Merycodus loxocerus Furlong p. 4 figs. Plates 1 - 4
1937Cosoryx (Paracosoryx) loxocerus Frick p. 349
1987Paracosoryx loxocerus Tedford et al.
2007Paracosoryx loxoceros Davis p. 229

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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
genusParacosoryx()
speciesloxoceros()

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.

†Paracosoryx loxoceros Furlong 1934
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Diagnosis
ReferenceDiagnosis
E. L. Furlong 1934Merycodus loxocerus is characterized by the backward inclination of the horn-cores at an acute angle; lower molar teeth with sharply ridged anterior and posterior crescents; frequent occurrence of intercrescentic columnettes in m1 and m2, and by constancy in length of inferior dental series.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
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, c = class, subp = subphylum
References: Lillegraven 1979, Carroll 1988, Nowak 1999, Hendy et al. 2009, Nowak 1991

Age range: Barstovian or 16.30000 to 12.50000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Barstovian16.3 - 12.5USA (Nevada) Merycodus loxocerus (type locality: 19097) Paracosoryx loxocerus (19088)