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Arretotherium fricki

Mammalia - Anthracotheriidae

Taxonomy
Arretotherium fricki was named by Macdonald and Schultz (1956). Its type specimen is UNSM 5764, a skull (A badly crushed cranium with right P \ M1 - M2, M3 (roots), and left C/-P1 (alveoli), P2-M3, (W+)), and it is a 3D body fossil. Its type locality is Hemingford Quarry 12, which is in a Hemingfordian terrestrial horizon in the Runningwater Formation of Nebraska.

Synonymy list
YearName and author
1956Arretotherium fricki Macdonald and Schultz

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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
RankNameAuthor
classMammalia
—Theriamorpha(Rowe 1993)
—Theriiformes()
—Trechnotheria
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
—Whippomorpha
superfamilyHippopotamoideaGray 1821
familyAnthracotheriidaeLeidy 1869
genusArretotherium
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.

†Arretotherium fricki Macdonald and Schultz 1956
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Diagnosis
ReferenceDiagnosis
J. R. Macdonald and C. B. Schultz 1956M3 mesostyle not notched to base by transverse groove, P 4 greatly reduced, P 2 similar to P 3 , P 1 - P 3 unreduced, canine small with little lateral compression.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingg
Diet: grazerg
Reproduction: viviparoussubc
Created: 2005-08-31 14:33:30
Modified: 2005-09-02 12:04:33
Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Lillegraven 1979, Hendy et al. 2009, Kron and Manning 1998, Carroll 1988

Age range: Hemingfordian or 20.43000 to 15.97000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Hemingfordian20.43 - 15.97USA (Nebraska) Arretotherium fricki (type locality: 17938)
Hemingfordian20.43 - 15.97USA (Nebraska) Arretotherium fricki (17982)
Hemingfordian20.43 - 15.97USA (South Dakota) Arretotherium fricki (17912)
Hemingfordian20.43 - 15.97Canada (Saskatchewan) Arretotherium fricki (17870)