Opal (UW 1-67): Bridgerian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Hyrachyidae
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Hyrachyus modestus
(Leidy 1870)
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2 specimens | |||||||||
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= Hyrachyus sp.
Leidy 1871
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Alroy 2002 | |||||||||
| status unclear in light of Gunnell 1998c | ||||||||||
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Mammalia
- Perissodactyla
- Equidae
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Orohippus pumilus
(Marsh 1871)
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2 specimens | |||||||||
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Mammalia
- Nyctitheriidae
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Scenopagus priscus
(Marsh 1872)
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4 specimens | |||||||||
| original and current combination Nyctitherium priscus | ||||||||||
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Mammalia
- Rodentia
- Ischyromyidae
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Paramys cf. delicatus
Leidy 1871
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2 specimens | |||||||||
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Leptotomus parvus
Wood 1959
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9 specimens | |||||||||
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Mammalia
- Rodentia
- Sciuravidae
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Sciuravus nitidus
Marsh 1871
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1 specimen | |||||||||
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Sciuravus bridgeri
Wilson 1938
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1 specimen | |||||||||
| called into question by Gunnell 1998c | ||||||||||
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Mammalia
- Primates
- Microsyopidae
|
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Microsyops elegans
(Marsh 1871)
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1 specimen | |||||||||
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Mammalia
- Primates
- Notharctidae
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Notharctus sp.
Leidy 1870
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5 specimens | |||||||||
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= Notharctus robinsoni
Gingerich 1979
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Gingerich 1979 | |||||||||
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Mammalia
- Esthonychidae
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Trogosus latidens
(Marsh 1874)
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1 specimen | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Lincoln |
| Coordinates: | 41.8° North, 110.3° West (view map) | ||||
| Paleocoordinates: | 45.8° North, 96.5° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
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
| Primary lithology: | tuff |
| Lithology description: white tuff bed... typically varies between 3 to 8 feet in thickness... very fine-grained and highly altered and in places interbedded in the tuff are laminated siltstones | |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection size: | 28 specimens |
| Museum repositories: | UW |
| Taxonomic list comments:the following records appear to be from the Opal area, but exact localities are unclear and all five species occur in the new UM collections of Gunnell 1998c: Anaptomorphus westi Gunnell 1995a: UW V-65003, 65004, 67034 Patriofelis ulta Gazin 1957: "20-25 miles east of Kemmerer, Wyo." Bathyopsis "middleswarti" Wheeler 1961: type Stylinodon mirus Schoch 1986 Palaeosyops fontinalis Osborn 1929: type, from Big Sandy Creek near the Green River | |
Metadata
| Database number: | 16355 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1999-09-21 00:00:00 | Last modified: | 2004-03-09 13:19:53 |
| Access level: | the public | Released: | 1999-09-21 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 2526. | 5% 39140 | P. O. McGrew and R. Sullivan. 1971. The stratigraphy and paleontology of Bridger A. Contributions to Geology, University of Wyoming 9(2):66-85 [J. Alroy/J. Alroy/J. Marcot] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
| 1638 | P. D. Gingerich. 1979. Phylogeny of middle Eocene Adapidae (Mammalia, Primates) in North America: Smilodectes and Notharctus. Journal of Paleontology 53(1):153-163 [J. Alroy/J. Alroy/J. Alroy] |