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Anchitherium clarencei

Mammalia - Perissodactyla - Equidae

Taxonomy
Anchitherium clarencei was named by Simpson (1932). Its type specimen is FSGS V5074, a mandible, and it is a 3D body fossil. Its type locality is Midway, which is in a Hemingfordian terrestrial horizon in the Torreya Formation of Florida.

It was synonymized subjectively with Anchitherium navasotae by Forsten (1975); it was recombined as Kalobatippus clarencei by MacFadden (1998).

Synonymy list
YearName and author
1932Anchitherium clarencei Simpson p. 32 fig. 19
1940Anchitherium clarenci Stirton p. 174
1991Anchitherium clarencei Albright
1991Anchitherium clarencei Bryant
1998Kalobatippus clarencei MacFadden
2001Anchitherium clarencei MacFadden
2009Anchitherium clarencei MacFadden

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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
—Panperissodactyla
superorderPerissodactylamorpha
orderPerissodactyla()
superfamilyEquoidea
familyEquidae
subfamilyAnchitheriinae()
genusAnchitheriumvon Meyer 1844
speciesclarencei

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.

†Anchitherium clarencei Simpson 1932
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Diagnosis
ReferenceDiagnosis
G. G. Simpson 1932An anchitheriine horse about the size of A. agatense. Upper molars subquadrate, little transverse. M3 reduced, M3 not fully triangular. Proto-and metalophs strongly crested, sinuous. Molar hypostyles triangular, cingular, pitted, united by crest to hypocone. Faint vestigial external ribs on upper molars. No internal cingula.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-31 16:55:50
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979, Carroll 1988

Age range: base of the Hemingfordian to the top of the Early/Lower Barstovian or 18.50000 to 12.50000 Ma

Collections (9 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Hemingfordian18.5 - 16.3Panama Anchitherium clarencei (89444) Anchitherium sp. (18725)
Early/Lower Hemingfordian18.5 - 16.3USA (California) Kalobatippus clarencei (167840)
Early/Lower Hemingfordian18.5 - 16.3Panama (Panama City) Anchitherium clarencei (144879)
Hemingfordian18.5 - 16.3USA (South Dakota) Anchitherium agatensis (17912)
Hemingfordian18.5 - 16.3USA (Florida) Anchitherium clarencei (type locality: 18561 18586 18597)
Early/Lower Barstovian16.3 - 12.5USA (Florida) Anchitherium clarencei (18549)