PBDB Taxon

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Uintatherium anceps

Mammalia - Dinocerata - Uintatheriidae

Taxonomy

Titanotherium anceps was named by Marsh (1871).

It was recombined as Mastodon anceps by Marsh (1872); it was recombined as Tinoceras anceps by Marsh (1872) and Hay (1902); it was synonymized subjectively with Uintatherium robustum by Cope (1873); it was recombined as Uintatherium anceps by Wheeler (1961), Gazin (1976) and Lucas and Schoch (1998).

Synonyms

Loxolophodon furcatus was named by Cope (1872).

It was recombined as Eobasileus furcatus by Cope (1873) and Hay (1902); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras agreste was named by Marsh (1885). Its type locality is Spanish John's Meadow, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras cuneum was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras distans was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras lacustre was named by Marsh (1872).

It was recombined as Uintatherium lacustre by Cope (1873); it was recombined as Tinoceras lacustre by Marsh (1885) and Hay (1902); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras laticeps was named by Marsh (1873). Its type specimen is YPM 11039 and is a 3D body fossil. Its type locality is Spanish John's Meadow, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was recombined as Octotomus laticeps by Cope (1885); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras lucare was named by Marsh (1873). Its type locality is Sage Creek Mountain (Bridger D), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Dinoceras mirabile was named by Marsh (1872). Its type specimen is YPM 11036 and is a 3D body fossil. Its type locality is Sage Creek Mountain (Bridger D), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was synonymized subjectively with Uintatherium robustum by Leidy (1872) and Leidy (1873); it was recombined as Uintatherium mirabile by Cope (1873); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961) and Gazin (1976).
Dinoceras reflexum was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Elachoceras parvum was named by Scott (1886) [genotype]. It is the type species of Elachoceras.

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras affine was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras crassifrons was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras grande was named by Marsh (1872).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras hians was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras jugum was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras latum was named by Marsh (1885). Its type locality is Spanish John's Meadow, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras pugnax was named by Marsh (1885).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Tinoceras vagans was named by Marsh (1885).

It was recombined as Uintatherium vagans by Wilson (1937); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Uintamastix atrox was named by Leidy (1872) [genotype].

It was synonymized subjectively with Uintatherium robustum by Leidy (1872), Leidy (1873), Cope (1873) and Hay (1902); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961) and Gazin (1976).
Uintatherium alticeps was named by Scott (1886).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Uintatherium latifrons was named by Marsh (1885). Its type locality is Sage Creek Mountain (Bridger D), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Uintatherium leidianum was named by Osborn et al. (1878).

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Uintatherium princeps was named by Osborn et al. (1878).

It was synonymized subjectively with Uintatherium robustum by Osborn (1881); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).
Uintatherium robustum was named by Leidy (1872) [genotype].

It was synonymized subjectively with Uintatherium anceps by Wheeler (1961) and Gazin (1976).
Uintatherium segne was named by Marsh (1885).

It was recombined as Ditetrodon segne by Cope (1885); it was synonymized subjectively with Uintatherium anceps by Wheeler (1961).

Synonymy list

Year	Name and author
1871	Titanotherium anceps Marsh p. 35
1872	Loxolophodon furcatus Cope
1872	Uintamastix atrox Leidy p. 240
1872	Uintatherium robustum Leidy p. 240
1872	Dinoceras lacustre Marsh
1872	Dinoceras mirabile Marsh
1872	Mastodon anceps Marsh
1872	Tinoceras anceps Marsh
1872	Tinoceras grande Marsh
1873	Eobasileus furcatus Cope p. 22
1873	Uintatherium lacustre Cope p. 24
1873	Uintatherium mirabile Cope p. 24
1873	Uintatherium robustum Cope p. 24
1873	Uintatherium robustum Leidy p. 96
1873	Dinoceras laticeps Marsh
1873	Dinoceras lucare Marsh
1878	Uintatherium leidianum Osborn et al.
1878	Uintatherium princeps Osborn et al.
1878	Uintatherium leidianum Osborn et al. p. 63
1878	Uintatherium princeps Osborn et al. p. 81
1885	Octotomus laticeps Cope
1885	Ditetrodon segne Cope p. 594
1885	Dinoceras agreste Marsh
1885	Dinoceras cuneum Marsh
1885	Dinoceras distans Marsh
1885	Dinoceras reflexum Marsh
1885	Tinoceras affine Marsh
1885	Tinoceras crassifrons Marsh
1885	Tinoceras hians Marsh
1885	Tinoceras jugum Marsh
1885	Tinoceras lacustre Marsh
1885	Tinoceras latum Marsh
1885	Tinoceras pugnax Marsh
1885	Tinoceras vagans Marsh
1885	Uintatherium latifrons Marsh
1885	Uintatherium segne Marsh
1886	Elachoceras parvum Scott
1886	Uintatherium alticeps Scott
1902	Dinoceras agreste Hay p. 702
1902	Uintatherium alticeps Hay p. 702
1902	Uintatherium latifrons Hay p. 702
1902	Uintatherium leidianum Hay p. 702
1902	Uintatherium princeps Hay p. 702
1902	Uintatherium robustum Hay p. 702
1902	Uintatherium segne Hay p. 702
1902	Dinoceras cuneum Hay p. 703
1902	Dinoceras distans Hay p. 703
1902	Dinoceras laticeps Hay p. 703
1902	Dinoceras lucare Hay p. 703
1902	Dinoceras mirabile Hay p. 703
1902	Dinoceras reflexum Hay p. 703
1902	Tinoceras affine Hay p. 704
1902	Tinoceras anceps Hay p. 704
1902	Tinoceras crassifrons Hay p. 704
1902	Tinoceras grande Hay p. 704
1902	Elachoceras parvum Hay p. 705
1902	Tinoceras hians Hay p. 705
1902	Tinoceras jugum Hay p. 705
1902	Tinoceras lacustre Hay p. 705
1902	Tinoceras latum Hay p. 705
1902	Tinoceras pugnax Hay p. 705
1902	Tinoceras vagans Hay p. 705
1902	Eobasileus furcatus Hay p. 706
1937	Uintatherium vagans Wilson
1961	Uintatherium anceps Wheeler
1976	Uintatherium anceps Gazin
1998	Uintatherium anceps Lucas and Schoch p. 287

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967

Rank	Name	Author
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Uintatheriamorpha
order	Dinocerata
family	Uintatheriidae	Flower 1876
subfamily	Uintatheriinae	Flower 1876
genus	Uintatherium	Leidy 1872
species	anceps	()

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.

†Uintatherium anceps Marsh 1871

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Invalid names: Dinoceras agreste Marsh 1885 [synonym], Dinoceras cuneum Marsh 1885 [synonym], Dinoceras distans Marsh 1885 [synonym], Dinoceras lacustre Marsh 1872 [synonym], Dinoceras laticeps Marsh 1873 [synonym], Dinoceras lucare Marsh 1873 [synonym], Dinoceras mirabile Marsh 1872 [synonym], Dinoceras reflexum Marsh 1885 [synonym], Elachoceras parvum Scott 1886 [synonym], Loxolophodon furcatus Cope 1872 [synonym], Tinoceras affine Marsh 1885 [synonym], Tinoceras crassifrons Marsh 1885 [synonym], Tinoceras grande Marsh 1872 [synonym], Tinoceras hians Marsh 1885 [synonym], Tinoceras jugum Marsh 1885 [synonym], Tinoceras latum Marsh 1885 [synonym], Tinoceras pugnax Marsh 1885 [synonym], Tinoceras vagans Marsh 1885 [synonym], Uintamastix atrox Leidy 1872 [synonym], Uintatherium alticeps Scott 1886 [synonym], Uintatherium latifrons Marsh 1885 [synonym], Uintatherium leidianum Osborn et al. 1878 [synonym], Uintatherium princeps Osborn et al. 1878 [synonym], Uintatherium robustum Leidy 1872 [synonym], Uintatherium segne Marsh 1885 [synonym]

Diagnosis

Reference	Diagnosis
W. H. Wheeler 1961	Same as for genus. [Large uintathere, distinguished from Eobasileus and Tetheopsis by skull propor- tions. Skull relatively broad with parietal horn well in advance of occiput. The relative propor- tions for the large genera are shown in figure 1. Posterodorsal part of temporal fossa very wide; maxillary horn above diastema. Skull in known specimens 69 to 85 cm. long; upper cheek tooth row 143 to 169 mm long.]

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialc

Locomotion:

actively mobilec

Life habit:

ground dwellingo

Diet:

herbivoreo

Created:

2005-08-31 13:51:18

Modified:

2005-08-31 15:51:18

Source: o = order, c = class, subp = subphylum

References: Lucas and Schoch 1998, Carroll 1988, Hopson 1973, Hendy et al. 2009

Age range: base of the Bridgerian to the top of the Uintan or 50.30000 to 39.70000 Ma

Collections (18 total)

Time interval	Ma	Country or state	Original ID and collection number
Bridgerian	50.3 - 46.2	USA (Wyoming)	Dinoceras agreste, Dinoceras laticeps, Tinoceras latum (16417) Dinoceras lucare, Dinoceras mirabile, Uintatherium latifrons (16404) Uintatherium anceps (16086 16200 16211 16234 16235 16236 16250 16278 16406 16421 16442 16448 16647) Uintatherium mirabile (16213)
Early/Lower Uintan	46.2 - 39.7	USA (Wyoming)	Uintatherium anceps (186968)
Uintan	46.2 - 39.7	USA (Texas)	Uintatherium anceps (16588)