East of Little America: Bridgerian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Testudines
- Trionychidae
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Aspideretes annae n. sp.
Zangerl 1944
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synonym of Trionyx ellipticus | ||||||||||
(1 measurement) | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Wyoming | County: | Sweetwater |
Coordinates: | 41.5° North, 109.8° West (view map) | ||||
Paleocoordinates: | 45.5° North, 96.0° West | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | small collection |
Time
Period: | Paleogene | Epoch: | Eocene |
10 m.y. bin: | Cenozoic 2 | ||
*Period: | Early/Lower Tertiary | *Epoch: | Middle Eocene | *Local age/stage: | Bridgerian |
Key time interval: | Bridgerian | ||
Age range of interval: | 50.30000 - 46.20000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Bridger | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: single specimen; unit or level within the Bridger not indicated |
Lithology and environment
Primary lithology: | gray claystone |
Lithology description: "gray clay" | |
Environment: | mire/swamp |
Geology comments: specimen "probably sank into a deep, soft swamp mud... marsh deposites" near "channel fills" |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Articulated whole bodies: | all |
Associated major elements: | none |
Disassociated major elements: | none |
Disassociated minor elements: | none |
Collection methods and comments
Collection methods: | surface (in situ),field collection |
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 27382 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | J. Alroy | Research group: | vertebrate |
Created: | 2002-12-04 17:19:59 | Last modified: | 2005-12-10 20:01:42 |
Access level: | the public | Released: | 2002-12-04 17:19:59 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7557. | R. Zangerl. 1944. Aspideretes annae n. sp., a new species of soft shell turtle from the Bridger Eocene of Wyoming. American Midland Naturalist 31(3):583-591 [J. Alroy/J. Alroy/J. Alroy] |