Dead Horse: Orellan, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Leptictidae
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Leptictis sp.
Leidy 1868
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= Leptictidae indet.
Gill 1872
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Alroy 2002 | |||||||||
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Mammalia
- Perissodactyla
- Equidae
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Mesohippus bairdi
(Leidy 1850)
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Mammalia
- Perissodactyla
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Rhinocerotoidea indet.
Gray 1821
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| "larger rhino", hyracodontid or rhinocerotid | ||||||||||
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Mammalia
- Perissodactyla
- Hyracodontidae
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Hyracodon nebraskensis
(Leidy 1850)
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Mammalia
- Entelodontidae
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Archaeotherium mortoni
Leidy 1850
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Mammalia
- Hypisodontidae
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Hypisodus minimus
(Cope 1873)
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Mammalia
- Hypertragulidae
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Hypertragulus calcaratus
(Cope 1873)
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Mammalia
- Leptomerycidae
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Leptomeryx sp.
Leidy 1853
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| large | ||||||||||
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Leptomeryx evansi
Leidy 1853
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Mammalia
- Camelidae
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Poebrotherium wilsoni
Leidy 1847
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Mammalia
- Merycoidodontidae
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Platyochoerus platycephalus
(Thorpe 1921)
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| synonym of Miniochoerus affinis | ||||||||||
| and "Stenopsochoerus sternbergi" Schultz and Falkenbach 1956: UNSM Dw-104, Brule Zone A | ||||||||||
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Miniochoerus gracilis
(Leidy 1851)
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Merycoidodon culbertsoni
(Leidy 1848)
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| original and current combination Merycoidodon culbertsonii | ||||||||||
| includes "M. culbertsonii" and "M. culbertsoni osborni" specimens from Brecht Ranch, UNSM Dw-104, Orella A of Schultz and Falkenbach 1968 | ||||||||||
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Mammalia
- Leptochoeridae
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Stibarus lemurinus
(Cope 1874)
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| synonym of Stibarus obtusilobus | ||||||||||
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Mammalia
- Carnivora
- Nimravidae
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Dinictis felina
Leidy 1854
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Hoplophoneus primaevus
(Leidy and Owen 1851)
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Mammalia
- Carnivora
- Amphicyonidae
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Daphoenus sp.
Leidy 1853
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Hunt 1998 | |||||||||
| "Orella Member... Brecht Ranch area, Dawes Co." | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Hesperocyon gregarius
(Cope 1873)
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| confirmed by Wang 1994 based on F:AM and UNSM Orella A specimens from Walter Brecht Ranch, UNSM Dw-104 | ||||||||||
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Mammalia
- Creodonta
- Hyaenodontidae
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Hyaenodon crucians
Leidy 1853
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Mammalia
- Lagomorpha
- Leporidae
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Megalagus turgidus
(Cope 1873)
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Palaeolagus haydeni
Leidy 1856
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Mammalia
- Rodentia
- Ischyromyidae
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Ischyromys parvidens
Miller and Gidley 1920
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= Ischyromys sp.
Leidy 1856
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Alroy 2002 | |||||||||
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Mammalia
- Rodentia
- Eomyidae
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Paradjidaumo trilophus
(Cope 1873)
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| recombined as Adjidaumo trilophus | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nebraska | County: | Dawes |
| Coordinates: | 42.8° North, 103.1° West (view map) | ||||
| Paleocoordinates: | 44.0° North, 95.0° West | ||||
| Basis of coordinate: | based on political unit |
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: | 302 specimens |
| Taxonomic list comments:"appears to correlate with... Orella A" based on stratigraphic criteria; directly overlies PWL includes: CSC-5 (in part) Schommer Ranch CSC-6 Bartlett Ranch CSC-8 White Ranch CSC-41 Rook Ranch CSC-44 Hawthorne Ranch CSC-81 Horse Island CSC-82 Central Turtle Level NISP 302, excluding indeterminate rhino Walter Brecht Ranch, 25-30 ft above White Marker Zone and "4 mi west and 4 mi south of Chadron... just below Blue Ash" of Wang 1994 are clearly the same as CSC-41 based on sections, geography | |
Metadata
| Database number: | 17098 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 1993-02-18 00:00:00 | Last modified: | 2002-06-03 03:27:41 |
| Access level: | the public | Released: | 1993-02-18 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 1757. | E. P. Gustafson. 1986. Preliminary biostratigraphy of the White River Group (Oligocene, Chadron and Brule formations) in the vicinity of Chadron, Nebraska. Transactions of the Nebraska Academy of Sciences 14:7-20 [J. Alroy/J. Alroy/M. Uhen] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
| 1977 | R. M. Hunt, Jr. 1998. Amphicyonidae. 196-227 [J. Alroy/J. Alroy/J. Alroy] |