Where: Grant County, North Dakota (46.7° N, 101.8° W: paleocoordinates 51.4° N, 80.1° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Slope Formation, Tiffanian (61.7 - 56.8 Ma)
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Collected by R. Holtzman in 1977
Collection methods: surface (in situ),
Primary reference: R. C. Holtzman. 1978. Late Paleocene Mammals of the Tongue River Formation, Western North Dakota. North Dakota Geological Survey Report of Investigations 65:1-88 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 14931: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd, Matthew Carrano and Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
3.7 to 7.0 m above base of Slope Fm. (NOT Tongue River Fm.): Hartman and Kihm 1991
Gunnell 1994 lists P. sp. "C"; not clear if this replaces P. montanus
Osteichthyes | |
Acipenser sp. Linnaeus 1758 sturgeon | |
Aves | |
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Reptilia | |
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Champsosaurus sp. Cope 1876 choristodere | |
Mammalia | |
Palaeoryctes cf. punctatus Van Valen 1966 eutherian
Pararyctes pattersoni Van Valen 1966 eutherian | |
Unuchinia dysmathes Holtzman 1978 eutherian | |
Propalaeosinopa albertensis Simpson 1927 eutherian | |
Titanoides ? primaevus Gidley 1917 pantodont | |
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Protictis paralus Holtzman 1978 placental | |
Miacidae indet. Cope 1880 carnivoran | |
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Thryptacodon australis Simpson 1935 condylarth | |
Leptacodon tener Matthew and Granger 1921 placental | |
Picrodontidae indet. Simpson 1937 primate | |
Plesiadapis rex Gidley 1923 primate
Nannodectes sp. Gingerich 1975 primate | |
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Ignacius frugivorus Matthew and Granger 1921 primate | |
Peradectes elegans Matthew and Granger 1921 marsupial | |
Neoplagiaulax hunteri Simpson 1936 multituberculate
Parectypodus sp. Jepsen 1930 multituberculate
Ectypodus sp. Matthew and Granger 1921 multituberculate | |
Ptilodus montanus Douglass 1908 multituberculate | |
Amphibia | |
Opisthotriton sp. Auffenberg 1961 salamander | |
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Actinopteri | |
Lepisosteus sp. Agassiz 1843 gar | |
Chondrichthyes | |
Odontaspis sp. Agassiz 1838 sand tiger shark |