Dillon Pass (North): Orellan, South Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
- Testudinidae
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Stylemys sp.
Leidy 1851
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Mammalia
- Rodentia
- Aplodontidae
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Prosciurus relictus
(Cope 1873)
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| recombined as Altasciurus relictus | |||||||
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Mammalia
- Rodentia
- Cricetidae
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Eumys elegans
Leidy 1856
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Mammalia
- Rodentia
- Ischyromyidae
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Ischyromys typus
Leidy 1856
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Mammalia
- Lagomorpha
- Leporidae
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Palaeolagus haydeni
Leidy 1856
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Mammalia
- Carnivora
- Canidae
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Hesperocyon sp.
Scott 1890
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Mammalia
- Merycoidodontidae
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Merycoidodon gracilis
(Leidy 1851)
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| recombined as Miniochoerus gracilis | |||||||
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Mammalia
- Leptomerycidae
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Leptomeryx evansi
Leidy 1853
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Mammalia
- Hypisodontidae
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Hypisodus minimus
(Cope 1873)
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Mammalia
- Hypertragulidae
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Hypertragulidae indet.
Cope 1879
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Hypertragulus calcaratus
(Cope 1873)
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Mammalia
- Entelodontidae
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Archaeotherium sp.
Leidy 1850
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Mammalia
- Perissodactyla
- Equidae
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Mesohippus bairdi
(Leidy 1850)
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Mammalia
- Perissodactyla
- Tapiridae
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Colodon dakotensis
Osborn and Wortman 1895
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| synonym of Colodon occidentalis | |||||||
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Mammalia
- Leptictidae
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Ictops sp.
Leidy 1868
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= Leptictidae indet.
Gill 1872
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Alroy 2002 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | South Dakota | County: | Pennington |
| Coordinates: | 43.9° North, 102.4° West (view map) | ||||
| Paleocoordinates: | 45.0° North, 94.2° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| *Period: | Tertiary | ||
| Key time interval: | Orellan | ||
| Age range of interval: | 33.90000 - 31.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection size: | 114 specimens |
| Reason for describing collection: | paleoecologic analysis |
| Museum repositories: | SDSM |
| Taxonomic list comments:species-level i.d.s based on Damuth 1982, except for M. gracilis NISP 114 | |
Metadata
| Also known as: | SDSM Collection IV | ||
| Database number: | 17102 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | J. Alroy | Research group: | vertebrate |
| Created: | 1995-10-18 00:00:00 | Last modified: | 2006-09-13 00:29:51 |
| Access level: | the public | Released: | 1995-10-18 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 6205. | J. Clark and K. K. Kietzke. 1967. Paleoecology of the Lower Nodular Zone, Brule Formation, in the Big Badlands of South Dakota. Fieldiana 5(7):111-137 [J. Alroy/J. Alroy/J. Alroy] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] |