Also known as Cook's Pliohippus Quarry
Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 42.7° N, 102.1° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Johnson Member (Snake Creek Formation), Hemphillian (10.3 - 4.9 Ma)
Environment/lithology: terrestrial
Primary reference: M. F. Skinner, S. M. Skinner, and R. J. Gooris. 1977. Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska. Bulletin of the American Museum of Natural History 158(5):263-370 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 18499: authorized by John Alroy, entered by John Alroy on 05.08.1992
Creative Commons license: CC BY (attribution)
Taxonomic list
specimen of Agriotherium sp. could be from the Laucomer Mbr.
| Mammalia | |
Pliogeomys russelli n. sp.4
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"Prodipodomys coquorum" = Perognathus coquorum1
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Gaillardia thomsoni n. sp.
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Pliotaxidea nevadensis Butterworth 1916 badger described by Cook and Macdonald 1962, from "Pliohippus Draw... Pliohippus leidyanus level"
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Arctonasua eurybates n. sp.2
Arctonasua eurybates n. sp.2 Baskin 1982 procyonid carnivore "Upper channel fill in Pliohippus Draw... Johnson Member"
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"Merychyus cf. major" = Ustatochoerus major1
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Neotragocerus improvisus n. sp.
Neotragocerus improvisus n. sp. Matthew and Cook 1909 antelope | |
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Pediomeryx cf. hemphillensis Stirton 1936 ruminant | |
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Prosthennops serus Cope 1877 peccary | |
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Dinohippus leidyanus n. sp.
Dinohippus leidyanus n. sp. Osborn 1918 horse | |
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Megalonyx curvidens Matthew 1924 edentate | |