Skarboe Spur: Monroecreekian, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Proscalopidae
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Proscalops secundus
Matthew 1909
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Mammalia
- Lagomorpha
- Ochotonidae
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Gripholagomys lavocati
Green 1972
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Mammalia
- Lagomorpha
- Leporidae
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Palaeolagus philoi
Dawson 1958
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Mammalia
- Rodentia
- Mylagaulidae
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Promylagaulus riggsi
McGrew 1941
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Mammalia
- Rodentia
- Florentiamyidae
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? Florentiamys sp.
Wood 1936
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Hitonkala macdonaldtau
Korth 1992
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Mammalia
- Rodentia
- Cricetidae
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Paciculus nebraskensis
Alker 1969
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Mammalia
- Rodentia
- Allomyidae
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Alwoodia sp.
Rensberger 1983
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Mammalia
- Rodentia
- Entoptychidae
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Gregorymys formosus
(Matthew 1907)
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Mammalia
- Rodentia
- Sciuridae
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Protospermophilus sp.
Gazin 1930
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? Tamias sp.
Illinger 1811
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= Tamiini indet.
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Alroy 2007 | ||||||
| synonym of Marmotini | |||||||
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Mammalia
- Rodentia
- Castoridae
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Palaeocastor sp.
Leidy 1869
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Mammalia
- Rodentia
- Heteromyidae
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Schizodontomys cf. harkseni
(Macdonald 1970)
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Proheteromys sp.
Wood 1932
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Mammalia
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Herpetotherium sp.
Cope 1873
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Morrill |
| Coordinates: | 41.7° North, 103.0° West (view map) | ||||
| Paleocoordinates: | 42.6° North, 97.2° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Altitude: | 3990 feet | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Monroecreekian | ||
| Age range of interval: | 24.70000 - 23.10000 m.y. ago |
Stratigraphy
| Geological group: | Arikaree | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: "late early Arikareean" (= Monroecreekian) "Monroe Creek/Harrison formations, undifferentiated... middle Arikaree Group" | |||||
Lithology and environment
| Primary lithology: | volcaniclastic sandstone |
| Lithology description: "Harvester Ant hill built on massive volcaniclastic sandstone" | |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | mesofossils |
| Articulated whole bodies: | none |
| Associated major elements: | none |
| Disassociated major elements: | none |
| Disassociated minor elements: | all |
Collection methods and comments
| Collection methods: | bulk,anthill,sieve,field collection |
| Minimum sieve size: | 1.600 |
| Collection size: | 292 specimens |
| Rock censused: | 45 kg |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | UNSM |
| Collection method comments: rock censused consists of "concentrate," not the original sediment | |
| Taxonomic list comments:"Reptile remains were fairly common... no fish, amphibian, or bird elements" | |
Metadata
| Also known as: | UNSM Mo-163 | ||
| Database number: | 67637 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 2006-11-29 21:34:34 | Last modified: | 2012-01-23 20:49:29 |
| Access level: | the public | Released: | 2006-11-29 21:34:34 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 19303. | B. E. Bailey. 2004. Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas. Paludicola 4(3):81-113 [J. Alroy/J. Alroy] |
Secondary references:
| 19636 | J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy] |