Roundhouse Rock Gap: Arikareean, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Camelidae
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Miotylopus brachygnathus
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= Miotylopus gibbi
Loomis 1911
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Alroy 2002 | |||||||||
repeats misspelling of McKenna and Love 1972 | ||||||||||
Mammalia
- Merycoidodontidae
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Desmatochoerus (Paradesmatochoerus) wyomingensis
Schultz and Falkenbach 1954
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Schultz and Falkenbach 1954 | |||||||||
synonym of Mesoreodon minor | ||||||||||
Mo-107 and -108 | ||||||||||
Sespia marianae
Schultz and Falkenbach 1968
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= Sespia nitida
Leidy 1869
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Schultz and Falkenbach 1968 | |||||||||
also their "Megasespia middleswarti"; both from UNSM Mo-104, lower Gering; some small chance these are from Nipple Butte Quarry, a small mammal quarry within UNSM Mo-104 | ||||||||||
Pseudocyclopidius major
(Leidy 1856)
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= Leptauchenia major
Leidy 1856
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Schultz and Falkenbach 1968 | |||||||||
"east side of Roundhouse Rock... 15' above base of Gering"; includes their "Hadroleptauchenia shanafeltae" type "lower" Gering at UNSM Mo-104, Roundhouse Rock; also their "H. densa" from "upper" Gering at UNSM Mo-104 | ||||||||||
Mammalia
- Carnivora
- Palaeogalidae
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Palaeogale dorothiae
Macdonald 1963
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Mammalia
- Carnivora
- Canidae
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Archaeocyon leptodus
(Schlaikjer 1935)
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Wang et al. 1999 | |||||||||
"15 ft above marl, upper part" of member | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Nebraska | County: | Morrill |
Coordinates: | 41.7° North, 103.1° West (view map) | ||||
Paleocoordinates: | 42.6° North, 97.3° West | ||||
Basis of coordinate: | based on political unit |
Time
*Period: | Tertiary | *Epoch: | Oligocene |
Key time interval: | Arikareean | ||
Age range of interval: | 30.80000 - 20.43000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Brule | Member: | Brown Siltstone | ||
Local section: | NPlat | Local bed: | 5 | ||
Local order: | bottom to top | ||||
Stratigraphy comments: Unit A |
Lithology and environment
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Taxonomic list comments:a.k.a. Horn Member of Brule Formation said to include both the E of and 1/4 mi NW of Roundhouse Rock localities by Schultz and Falkenbach 1968 Roundhouse Rock Ash dated at 28.59 +/- 0.32 Ma by Prothero and Swisher 1992; this is within Unit A based on Tedford et al. 1996 status unclear: Mesoreodon "cheeki" Schultz and Falkenbach 1949: Gering Fm. at "Round House Rock, Pumpkin Creek, Morrill County" "Mesoreodon" megalodon Schultz and Falkenbach 1949: Gering Fm. at "Round House Rock" "Desmatochoerus wyomingensis" Schultz and Falkenbach 1954: "Roundhouse Rock" Mesoreodon does not range above Gering B, which is not exposed at Roundhouse Rock |
Metadata
Also known as: | Mo-104, in part | ||
Database number: | 17602 | ||
Authorizer: | J. Alroy, J. Marcot | Enterer: | J. Alroy, J. Marcot | Research group: | vertebrate |
Created: | 1993-02-18 00:00:00 | Last modified: | 2002-06-03 03:27:42 |
Access level: | the public | Released: | 1993-02-18 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
3345. | C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastern portion of the Wildcat Ridge, western Nebraska. 1-172 [J. Alroy/J. Alroy/J. Marcot] |
Secondary references:
6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
3067 | C. B. Schultz and C. H. Falkenbach. 1954. Desmatochoerinae, a new subfamily of oreodonts. Bulletin of the American Museum of Natural History 105(2) [J. Alroy/J. Alroy/J. Ju] | |
3069 | C. B. Schultz and C. H. Falkenbach. 1968. The Phylogeny of the Oreodonts. Part 1: Merycoidodontinae, Eporeodontinae, and Leptaucheniinae, Three Subfamilies Of Oreodonts, With an Appendix to the Revision Of The Merycoidodontidae, and Part 2. Summary and Conclusions Concerning the Merycoidodontidae. Bulletin of the American Museum of Natural History 139:1-498 [J. Alroy/J. Alroy/J. Marcot] | |
3558 | X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy] |