Cedar Pass (Leptauchenia Clays): Whitneyan, South Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Gruiformes
- Bathornithidae
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Paracrax gigantea n. sp.
Cracraft 1968
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Cracraft 1968 | |||||||||
"from Leptauchenia beds, Poleslide member... 2 miles north of east of Cedar Pass... collected in 1940 by M. F. Skinner, R. L. Mefferd, and associates" | ||||||||||
Mammalia
- Rodentia
- Aplodontidae
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Prosciurus sp.
(Matthew 1903)
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= Aplodontidae indet.
Brandt 1855
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Alroy 2002 | |||||||||
Aplodontidae indet.
Brandt 1855
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Mammalia
- Rodentia
- Zapodidae
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Zapodidae indet.
Coues 1875
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Mammalia
- Rodentia
- Cricetidae
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Cricetidae indet.
Fischer von Waldheim 1817
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Mammalia
- Rodentia
- Castoridae
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Agnotocastor sp.
Stirton 1935
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42 specimens | |||||||||
Palaeocastor nebrascensis
(Leidy 1856)
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Xu 1996 | |||||||||
"Basal Leptauchenia beds, 15-20 feet below the First White Layer, Interior" | ||||||||||
Mammalia
- Rodentia
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Proheteromys sp.
Wood 1932
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240 specimens | |||||||||
= Geomyoidea indet.
Bonaparte 1845
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Alroy 2002 | |||||||||
Mammalia
- Rodentia
- Eomyidae
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Adjidaumo sp.
Hay 1899
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9 specimens | |||||||||
Mammalia
- Lagomorpha
- Leporidae
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Palaeolagus sp.
Leidy 1856
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767 specimens | |||||||||
Mammalia
- Erinaceidae
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Erinaceidae indet.
Fischer von Waldheim 1817
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Proterix sp.
Matthew 1903
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15 specimens | |||||||||
Mammalia
- Proscalopidae
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Proscalops sp.
Matthew 1901
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33 specimens | |||||||||
Mammalia
- Soricidae
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Soricidae indet.
Fischer 1814
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Mammalia
- Geolabididae
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Geolabis sp.
Cope 1884
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5 specimens | |||||||||
= Centetodon sp.
Marsh 1872
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Alroy 2002 | |||||||||
Mammalia
- Carnivora
- Canidae
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Osbornodon sesnoni
(Macdonald 1967)
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Wang 1994 | |||||||||
N of Cedar Pass, base of Leptauchenia beds, Jackson Co. | ||||||||||
Hesperocyon pavidus
(Stock 1933)
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23 specimens | |||||||||
recombined as Archaeocyon pavidus | ||||||||||
0.25 mi W of Cedar Pass, basal Leptauchenia beds; said by Wang et al. 1999 to be from the basal Poleslide; may include "H. sp." ( although his is an F:AM specimen | ||||||||||
Mammalia
- Merycoidodontidae
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Paramerycoidodon major
Leidy 1853
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recombined as Merycoidodon major | ||||||||||
"1 1/2-2 1/2 mi. NE."; "1/4-1 mi. E."; "1/4-2 mi. W." of Cedar Pass; "400 yds. E. of Road" Cedar Pass; "M. lambi" type, 2 mi W of Cedar Pass, 25' above base of Leptauchenia beds; "1/4-1 mi. E."; "1 mi. NE."; and "1/4 mi W" of Cedar Pass; "M. lynchi" from "1/4 mi. W. of Cedar Pass"; "P. wanlessi" from 1/5-1 mi. E."; "1/4-1 1/4 mi. W."; "1/2-2/12 mi. NE." of Cedar Pass; "N. of Interior"; "Otionohyus alexi" from "E. side"; "1 mi. E."; "1 1/2 mi. NE."; "1/4 mi. W." of Cedar Pass; "2 1/2 mi. N. of Interior"; all from Brule Zone D, some presumably from below Wilson's sample | ||||||||||
Hadroleptauchenia primitiva
Schultz and Falkenbach 1968
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= Leptauchenia major
Leidy 1856
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Schultz and Falkenbach 1968 | |||||||||
"1/2 mi. E. of Cedar Pass"; "Pseudocyclopidius frankforteri" from "W. of"; "1/4-1 mi. E. of"; "near"; and "1 1/2 mi. NE. of" Cedar Pass; all "Brule Zone D" | ||||||||||
Leptauchenia decora
Leidy 1856
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Schultz and Falkenbach 1968 | |||||||||
Brule Zone D, both E and W of Cedar Pass | ||||||||||
Mammalia
- Leptomerycidae
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Leptomeryx sp.
Leidy 1853
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= Leptomerycidae indet.
Zittel 1893
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Alroy 2002 | |||||||||
Mammalia
- Tayassuidae
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Tayassuidae indet.
Palmer 1897
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"peccary": Tedford et al. 1996 | ||||||||||
Mammalia
- Perissodactyla
- Equidae
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Miohippus obliquidens
(Osborn 1904)
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Tedford et al. 1996 | |||||||||
Mammalia
- Perissodactyla
- Hyracodontidae
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Hyracodon sp.
Leidy 1856
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Tedford et al. 1996 | |||||||||
Mammalia
- Didelphimorphia
- Didelphidae
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Peratherium sp.
Aymard 1850
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= Didelphidae indet.
Gray 1821
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Alroy 2002 | |||||||||
see common names |
Geography
Country: | United States | State/province: | South Dakota | County: | Jackson |
Coordinates: | 43.5° North, 101.9° West (view map) | ||||
Paleocoordinates: | 44.4° North, 94.3° 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: | Whitneyan | ||
Age range of interval: | 31.80000 - 29.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Member: | upper Poleslide | ||||
Local section: | BgBad | Local bed: | 8 | ||
Local order: | bottom to top | ||||
Stratigraphy comments: Leptauchenia Clays |
Lithology and environment
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Collection size: | 894 specimens |
Taxonomic list comments:NISP 1134, but this includes only "small mammals" Morris Skinner collections from Cedar Pass mentioned by Tedford et al. 1996 are clearly from this facies |
Metadata
Database number: | 17317 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
Created: | 1995-03-26 00:00:00 | Last modified: | 2002-06-03 03:27:42 |
Access level: | the public | Released: | 1995-03-26 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
3707. | R. W. Wilson. 1985. The Dentition of the Paleocene "Insectivore" Genus Acmeodon Matthew and Granger (?Palaeoryctidae, Mammalia). Journal of Paleontology 59(3):713-720 [J. Alroy/J. Alroy/J. Ju] |
Secondary references:
6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
28306 | J. Cracraft. 1968. A review of the Bathornithidae (Aves, Gruiformes), with remarks on the relationships of the suborder Cariamae. American Museum Novitates 2326:1-46 [J. Alroy/J. Alroy] | |
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] | |
3386 | R. H. Tedford, C. C. Swisher, D. R. Prothero, S. A. King, and T. E. Tierney. 1996. The Whitneyan-Arikareean transition in the High Plains. In D. R. Prothero, R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 312-334 [J. Alroy/J. Alroy/M. Uhen] | |
6226 | X. Wang. 1994. Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 221:1-207 [J. Alroy/J. Alroy/J. Alroy] | |
3779 | X. Xu. 1996. Castoridae. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 412-432 [J. Alroy/J. Alroy/J. Marcot] |