MCAH: Arikareean, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Allomys sp.
Marsh 1877
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= Allomyinae indet.
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Alroy 2002 | |||||||||
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Mammalia
- Rodentia
- Mylagaulidae
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Promylagaulus sp.
McGrew 1941
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= Promylagaulinae indet.
Rensberger 1980
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Alroy 2002 | |||||||||
| could be Crucimys | ||||||||||
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Mammalia
- Rodentia
- Heteromyidae
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Proheteromys fedti
Macdonald 1963
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| recombined as Proharrymys fedti | ||||||||||
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Mammalia
- Rodentia
- Geomyidae
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Pleurolicus cf. sulcifrons
Cope 1878
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Mammalia
- Rodentia
- Castoridae
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Castoridae indet.
Gray 1821
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| said to be new | ||||||||||
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Palaeocastor nebrascensis
(Leidy 1856)
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= Palaeocastor sp.
Leidy 1869
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Alroy 2002 | |||||||||
| see Xu 1996 | ||||||||||
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Mammalia
- Rodentia
- Cricetidae
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Paciculus cf. insolitus
Cope 1879
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= Geringia mcgregori
Macdonald 1970
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Martin 1980 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Morrill |
| Coordinates: | 41.7° North, 103.1° West (view map) | ||||
| Paleocoordinates: | 42.6° North, 97.3° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| 10 m.y. bin: | Cenozoic 4-5 | ||
| *Period: | Tertiary | *Epoch: | Oligocene |
| Key time interval: | Arikareean | ||
| Age range of interval: | 29.50000 - 18.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Taxonomic list comments:only important micromammal locality in the basal Arikaree on Wildcat Ridge this and the other Morrill Co. basal Arikaree localities are to the east of Olsen's Ranch in Banner Co., source of the Olsen's Third Ash date of 27.79 +/- 0.08 Ma (SCLF AA) given by Tedford et al. 1996 |
Metadata
| Also known as: | Mo-107, in part | ||
| Database number: | 17541 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 1993-02-18 00:00:00 | Last modified: | 2002-06-03 03:27:42 |
| Access level: | the public | Released: | 1993-02-18 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 3345. | C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastern portion of the Wildcat Ridge, western Nebraska. 1-172 [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] | |
| 2423 | L. D. Martin. 1980. The early evolution of the Cricetidae in North America. University of Kansas Paleontological Contributions Vertebrata 102:1-42 [J. Alroy/J. Alroy/J. Alroy] |