Dead Horse: Orellan, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Lagomorpha - Leporidae
Mammalia - Rodentia - Ischyromyidae
Ischyromys parvidens Miller and Gidley 1920
Alroy 2002
Mammalia - Rodentia - Eomyidae
Mammalia - Entelodontidae
Mammalia - Hypisodontidae
Mammalia - Hypertragulidae
Mammalia - Leptomerycidae
large
Mammalia - Camelidae
Mammalia - Merycoidodontidae
includes "M. culbertsonii" and "M. culbertsoni osborni" specimens from Brecht Ranch, UNSM Dw-104, Orella A of Schultz and Falkenbach 1968
and "Stenopsochoerus sternbergi" Schultz and Falkenbach 1956: UNSM Dw-104, Brule Zone A
Mammalia - Leptochoeridae
Mammalia - Perissodactyla - Equidae
Mammalia - Perissodactyla
"larger rhino", hyracodontid or rhinocerotid
Mammalia - Perissodactyla - Hyracodontidae
Mammalia - Carnivora - Canidae
confirmed by Wang 1994 based on F:AM and UNSM Orella A specimens from Walter Brecht Ranch, UNSM Dw-104
Mammalia - Carnivora - Nimravidae
Dinictis felina Leidy 1854
Hoplophoneus primaevus (Leidy and Owen 1851)
Mammalia - Carnivora - Amphicyonidae
Hunt 1998
"Orella Member... Brecht Ranch area, Dawes Co."
Mammalia - Creodonta - Hyaenodontidae
Mammalia - Leptictidae
Leptictis sp. Leidy 1868
    = Leptictidae indet. Gill 1872
Alroy 2002
see common names

Geography
Country:United States State/province:Nebraska County:Dawes
Coordinates: 42.8° North, 103.1° West (view map)
Paleocoordinates:48.3° North, 87.0° West (Wright 2013)
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: 33.9 - 31.8 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Brule Member:Orella
Local section:PineR Local bed:2
Local order:bottom to top
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:2025-02-22 15:12:02
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC0
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]