Cedar Pass (Leptauchenia Clays) (Oligocene of the United States)
Where: Jackson County, South Dakota (43.5° N, 101.9° W: paleocoordinates 44.4° N, 94.3° W)
• coordinate based on political unit
When: upper Poleslide Member, Whitneyan (33.3 - 30.8 Ma)
• Leptauchenia Clays
Environment/lithology: terrestrial
Primary reference: 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]more details
PaleoDB collection 17317: authorized by John Alroy, entered by John Alroy on 26.03.1995
Creative Commons license: CC BY (attribution)
Taxonomic list
• 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
Morris Skinner collections from Cedar Pass mentioned by Tedford et al. 1996 are clearly from this facies
Show authors, comments, and common names
| Mammalia | |
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"Paramerycoidodon major" = Merycoidodon major Leidy 1853 oreodont "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
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"Hesperocyon pavidus" = Archaeocyon pavidus Stock 1933 bone-crushing dog 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
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Proscalops sp. Matthew 1901 placental | |
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Soricidae indet. Fischer 1814 shrew | |
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Erinaceidae indet. Fischer von Waldheim 1817 hedgehog
Proterix sp. Matthew 1903 hedgehog | |
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Palaeolagus sp. Leidy 1856 rabbit | |
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Aplodontidae indet. Brandt 1855 mountain beaver | |
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Adjidaumo sp. Hay 1899 rodent | |
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Agnotocastor sp. Stirton 1935 beaver
Palaeocastor nebrascensis6 Leidy 1856 beaver "Basal Leptauchenia beds, 15-20 feet below the First White Layer, Interior"
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Zapodidae indet. Coues 1875 jumping mouse | |
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Cricetidae indet. Fischer von Waldheim 1817 mouse | |
| Aves | |
Paracrax gigantea n. sp.2
Paracrax gigantea n. sp.2 Cracraft 1968 bird "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"
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