Lone Tree (Bridger C): Bridgerian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Saniwa crassa
(Marsh 1872)
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Gilmore 1928 | 1 specimen | ||||||||
| synonym of Saniwa ensidens | ||||||||||
| AMNH 6057, numerous fragmentary dorsal vertebrae; sacral centrum; 2 caudal vertebrae; fragmentary parts of limb and pelvic bones | ||||||||||
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Mammalia
- Perissodactyla
- Hyrachyidae
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Hyrachyus eximius
Leidy 1871
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Wood 1934 | |||||||||
| C4; also "H. hypostylus" from an unstated level | ||||||||||
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Mammalia
- Homacodontidae
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Antiacodon pygmaeus
(Cope 1872)
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West 1984 | |||||||||
| Bridger C4 | ||||||||||
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Homacodon vagans
Marsh 1872
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West 1984 | |||||||||
| C4 | ||||||||||
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Mammalia
- Helohyidae
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Helohyus plicodon
Marsh 1872
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West 1984 | |||||||||
| Bridger C4 | ||||||||||
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Mammalia
- Creodonta
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Limnocyon verus
Marsh 1872
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Matthew 1909 | |||||||||
| Bridger C4; also mentioned by Thorpe 1923a | ||||||||||
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Mammalia
- Geolabididae
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Didelphodus altidens
(Marsh 1872)
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McKenna et al. 1962 | |||||||||
| original and current combination Centetodon altidens | ||||||||||
| Bridger C, north of Lone Tree | ||||||||||
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Mammalia
- Dinocerata
- Uintatheriidae
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Uintatherium anceps
(Marsh 1871)
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Wheeler 1961 | |||||||||
| Bridger C4 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Uinta |
| Coordinates: | 41.2° North, 110.5° West (view map) | ||||
| Paleocoordinates: | 45.2° North, 96.8° West | ||||
| Basis of coordinate: | based on political unit |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 2 | ||
| *Period: | Tertiary | ||
| Key time interval: | Bridgerian | ||
| Age range of interval: | 50.50000 - 46.20000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Taxonomic list comments:Scenopagus curtidens Krishtalka 1976a: upper Bridger Scenopagus edenensis Krishtalka 1976a: upper Bridger Centetodon pulcher Lillegraven et al. 1981: type; level not stated Nyctitherium velox Krishtalka 1976b: "Late Bridgerian" Nyctitherium serotinum Krishtalka 1976b: upper Bridger Apatemys sp. "A. bellus": West 1973c; "vicinity of Lonetree" and "five miles north of Lonetree" in the Twin Buttes Mbr. Notharctus robustior Robinson 1957: "Bridger C or D" cf. Tetrapassalus sp. Schoch 1984a: unidentified epoicothere of Robinson 1963b and West 1973e from upper Bridger north of Lonetree Tillomys senex Wilson 1938b Sinopa major Thorpe 1923a: "lower Bridger"; status unclear as Gazin excludes this species from Bridger B Antiacodon venustus West 1984 |
Metadata
| Database number: | 16278 | ||
| Authorizer: | J. Alroy, P. Barrett | Enterer: | J. Alroy, T. Cleary | Research group: | vertebrate |
| Created: | 1996-08-05 00:00:00 | Last modified: | 2002-06-03 03:27:41 |
| Access level: | the public | Released: | 1996-08-05 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 1623. | C. L. Gazin. 1976. Mammalian Faunal Zones of the Bridger Middle Eocene. Smithsonian Contributions to Paleobiology 26:1-25 [J. Alroy/J. Alroy/J. Marcot] |
Secondary references:
| 14538 | C. W. Gilmore. 1928. Fossil lizards of North America. Memoirs of the National Academy of Sciences 22(3):1-201 [J. Head/J. Head/M. Carrano] | |
| 7017 | W. D. Matthew. 1909. The Carnivora and Insectivora of the Bridger Basin, middle Eocene. Memoirs of the American Museum of Natural History 9:289-567 [J. Alroy/J. Alroy/J. Alroy] | |
| 2542 | M. C. McKenna, P. Robinson, and D. W. Taylor. 1962. Notes on Eocene Mammalia and Mollusca from Tabernacle Butte, Wyoming. American Museum Novitates 2102:1-33 [J. Alroy/J. Alroy/R. Whatley] | |
| 3606 | R. M. West. 1984. Paleontology and Geology of the Bridger Formation, Southern Green River Basin, Southwestern Wyoming. Part 7. Survey of Bridgerian Artiodactyla, including description of a skull and partial skeleton of Antiacodon pygmaeus. Milwaukee Public Museum Contributions in Biology and Geology 56:1-47 [J. Alroy/J. Alroy/J. Marcot] | |
| 3622 | W. H. Wheeler. 1961. Revision of the Uintatheres. Peabody Museum of Natural History Bulletin 14:1-93 [J. Alroy/J. Alroy/M. Uhen] | |
| 3744 | H. E. Wood. 1934. Revision of the Hyrachyidae. Bulletin of the American Museum of Natural History 67(5):181-295 [J. Alroy/J. Alroy/J. Marcot] |