Also known as UNSM Dw-121
Where: Dawes County, Nebraska (42.8° N, 103.0° W: paleocoordinates 43.7° N, 96.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Arikaree Group, Geringian (30.8 - 26.3 Ma)
• "Gering Fm." according to Swisher 1982, but "near the base of the Arikaree Group" (Bailey 1992) and "early early Arikareean" (= Geringian) (Bailey 2004)
• group of beds-level stratigraphic resolution
Environment/lithology: coarse channel fill; unlithified conglomerate
Size class: mesofossils
Reposited in the UNSM
Collection methods: bulk, sieve,
• 1000+ identifiable specimens (Bailey 1992)
•rock censused includes processed "gravel concentrate" and not the original sediment (Bailey 2004)
Primary reference: B. E. Bailey. 1992. A new early Arikareean microfauna from northwestern Nebraska. Proceedings of the Nebraska Academy of Sciences 112:65 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 17709: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
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Proharrymys wahlerti n. sp.3, "Proheteromys fedti" = Proharrymys fedti1, "Kirkomys schlaikjeri" = Proharrymys schlaikjeri1
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Tylionomys voorhiesi n. sp.3, "Heliscomys woodi" = Tylionomys woodi4, Heliscomys sp.3, Heliscomys macdonaldi n. sp.3
Heliscomys sp.3 Cope 1873 rodent UNSM 130501 - "UNSM 130501 cannot be referred to any of the other species of heliscomyid identified from the Ridgeview fauna based on the morphology of the lower premolar."
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Carnivora indet. Bowdich 1821 carnivoran | |
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