Dead Horse (Oligocene of the United States)
Where: Dawes County, Nebraska (42.8° N, 103.1° W: paleocoordinates 44.0° N, 95.0° W)
• coordinate based on political unit
When: Orella Member (Brule Formation), Orellan (33.9 - 33.3 Ma)
Environment/lithology: terrestrial
Primary reference: 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]more details
PaleoDB collection 17098: authorized by John Alroy, entered by John Alroy on 18.02.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
• "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
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
Show authors, comments, and common names
| Mammalia | |
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Hyaenodon crucians Leidy 1853 creodont | |
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Hesperocyon gregarius Cope 1873 canid confirmed by Wang 1994 based on F:AM and UNSM Orella A specimens from Walter Brecht Ranch, UNSM Dw-104
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Dinictis felina Leidy 1854 false sabre-tooth
Hoplophoneus primaevus Leidy and Owen 1851 false sabre-tooth | |
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Mesohippus bairdi Leidy 1850 anchitheriine horse | |
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Hyracodon nebraskensis Leidy 1850 odd-toed ungulate | |
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Archaeotherium mortoni Leidy 1850 even-toed ungulate | |
"Stibarus lemurinus" = Stibarus obtusilobus
"Stibarus lemurinus" = Stibarus obtusilobus Cope 1873 even-toed ungulate | |
Miniochoerus gracilis, "Platyochoerus platycephalus" = Miniochoerus affinis, "Merycoidodon culbertsoni" = Merycoidodon culbertsonii
Miniochoerus gracilis Leidy 1851 oreodont
"Platyochoerus platycephalus" = Miniochoerus affinis Leidy 1869 oreodont and "Stenopsochoerus sternbergi" Schultz and Falkenbach 1956: UNSM Dw-104, Brule Zone A
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont 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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Poebrotherium wilsoni Leidy 1847 camel | |
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Hypertragulus calcaratus Cope 1873 ruminant | |
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Hypisodus minimus Cope 1873 ruminant | |
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Leptomeryx evansi Leidy 1853 ruminant | |
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Megalagus turgidus Cope 1873 rabbit
Palaeolagus haydeni Leidy 1856 rabbit | |
"Paradjidaumo trilophus" = Adjidaumo trilophus
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent | |
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