Levett Creek Quarry: Bridgerian, Wyoming
collected by C. L. Gazin, J. L. Kay 1941
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
- Geoemydidae
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Echmatemys callopyge
Hay 1908
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Vlachos 2020 | |||||||||
| Part of this material has been previously assigned to E. wyomingensis. Referred material. Four almost complete shells, USNM V 16766, 16770, 16778 and 16779. USNM V 16766 and 16770 were originally in the slab, whereas USNM V 16778 and 16779 were found in the vicinity of the slab. | ||||||||||
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Echmatemys wyomingensis
(Leidy 1870)
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22 specimens | |||||||||
| (1 measurement) | ||||||||||
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= Echmatemys septaria
Cope 1873
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Roberts 1962 | |||||||||
| subspecies E. septaria septaria: identified by Gilmore as E. wyomingensis | ||||||||||
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= Echmatemys naomi
Hay 1908
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Vlachos 2020 | |||||||||
| (part) Referred material. Fourteen almost complete shells, USNM V 16762–16765, 16767–16769, 16771–16776 and 16780. Twelve of these were originally in the slab, whereas two others (USNM V 16776 and 16780) were found in the vicinity of the slab. | ||||||||||
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Reptilia
- Baenidae
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Chisternon sp.
Leidy 1872
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1 specimen | |||||||||
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unclassified
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Echmatemys haydeni
(Leidy 1870)
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1 specimen | |||||||||
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= Baptemys wyomingensis
Leidy 1870
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Vlachos 2020 | |||||||||
| original and current combination Emys wyomingensis | ||||||||||
| USNM V 16761, Its original identification as Echmatemys is incorrect, on the basis of numerous features, and the specimen does not belong to a pan-testudinoid: the plastron is much smaller than the carapace, at least three inframarginal scutes are preserved, and the visceral covering of the plastral scutes is not as extensive as in Pan-Testudinoidea. Instead, this specimen is probably a pan-dermatemydid (sensu Joyce & Bourque 2016). | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Uinta |
| Coordinates: | 41.3° North, 110.2° West (view map) | ||||
| Paleocoordinates: | 45.3° 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 | ||
| Key time interval: | Bridgerian | ||
| Age range of interval: | 50.50000 - 46.20000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | volcaniclastic lithified argillaceous tuff |
| Lithology description: a solid block consisting of "a matrix of greenish gray tuff" that "consists largely of volcanic debris and clay pellts... It may be that this rock represents an ash fall on a muddy basin or flood plain where clay pellets existed prior to an ash shower" | |
| Environment: | pond |
| Geology comments: "pond deposit" according to Roberts 1962 | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Size sorting: | well |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | bulk,selective quarrying,mechanical,survey of museum collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | CM,USNM | ||
| Collectors: | C. L. Gazin, J. L. Kay | Collection dates: | 1941 |
| Taxonomic list comments:collection originally described by Gilmore 1945 | |||
Metadata
| Also known as: | Leavitt Creek | ||
| Database number: | 74504 | ||
| Authorizer: | J. Alroy, E. Vlachos | Enterer: | J. Alroy, E. Vlachos |
| Modifier: | J. Alroy | ||
| Created: | 2007-08-08 18:00:24 | Last modified: | 2010-11-24 21:45:29 |
| Access level: | the public | Released: | 2007-08-08 18:00:24 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 693. | C. W. Gilmore. 1945. A slab of fossil turtles from Eocene of Wyoming, with notes on the genus Echmatemys. American Journal of Science 243(3):102-107 [J. Alroy/M. Sommers/J. Alroy] |
Secondary references:
| 758 | D. C. Roberts. 1962. A study of Echmatemys callopyge from the Uinta Eocene of Utah, and its redefinition as a subspecies of E. septaria. Bulletin of the Museum of Comparative Zoology 127(6):375-400 [J. Alroy/M. Sommers/J. Alroy] | |
| 72241 | E. Vlachos. 2020. The turtles from ‘Gilmore’s slab’: evolution and diversity of the extinct turtle Echmatemys (Testudines: Testudinoidea: Geoemydidae) from the central United States. Journal of Systematic Palaeontology 1-24 [E. Vlachos/E. Vlachos] |