Also known as L6; L8
Where: Morton County, North Dakota (46.9° N, 101.5° W)
• Paleocoordinates: 55.0° N, 62.9° W (Wright 2013)
• coordinate based on political unit
• small collection-level geographic resolution
When: Tongue River Member (Fort Union Formation), Danian (66.0 - 61.6 Ma)
• Peppe et al. 2011: Paleomagnetic analyses of the Tongue River Member document a series of polarity reversals that can be correlated to C29n–C26r of the GPTS suggesting Danian age
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Collected by R. Holtzman in 1977
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 14962: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd and Matthew Carrano
Creative Commons license: CC0 (CC0)
Taxonomic list
probably actually in the Slope Fm.: Hartman and Kihm 1991
Gunnell 1994 lists Ptilodus sp. "C"; not clear if this replaces P. wyomingensis
| Bivalvia | |
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Bicorbula sp. Fischer 1887 clam | |
| Chondrichthyes | |
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Odontaspis sp. Agassiz 1838 sand tiger shark | |
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Myledaphus sp. Cope 1876 guitarfish | |
| Amphibia | |
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Opisthotriton sp. Auffenberg 1961 salamander | |
| Mammalia | |
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Propalaeosinopa albertensis Simpson 1927 placental | |
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Leptacodon ? tener Matthew and Granger 1921 placental | |
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Miacidae indet. Cope 1880 carnivoran
Viverravinae indet. Matthew 1909 carnivoran | |
Protictis paralus n. sp.
Protictis paralus n. sp. Holtzman 1978 placental | |
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Thryptacodon australis Simpson 1935 condylarth
Arctocyon sp. Blainville 1841 condylarth | |
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Ignacius frugivorus Matthew and Granger 1921 primate | |
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Palaeoryctes cf. punctatus Van Valen 1966 eutherian | |
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Titanoides primaevus Gidley 1917 pantodont | |
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Unuchinia dysmathes Holtzman 1978 eutherian | |
Neoplagiaulax sp., Neoplagiaulax hunteri, Neoplagiaulax nanophus, ? Ectypodus sp., Parectypodus sp., ? Mesodma sp.
Neoplagiaulax hunteri Simpson 1936 multituberculate
Neoplagiaulax nanophus Holtzman 1978 multituberculate
? Ectypodus sp. Matthew and Granger 1921 multituberculate
Parectypodus sp. Jepsen 1930 multituberculate
? Mesodma sp. Jepsen 1940 multituberculate | |
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Ptilodus wyomingensis Jepsen 1940 multituberculate | |
| Reptilia | |
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Champsosaurus sp. Cope 1876 choristodere | |
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| Aves | |
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| Reptilia | |
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| Osteichthyes | |
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Acipenser sp. Linnaeus 1758 sturgeon | |
| Actinopteri | |
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Amia sp. Linnaeus 1766 bowfin | |
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Lepisosteus sp. Agassiz 1843 gar | |
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Belonostomus sp.3 Agassiz 1834 | |