Also known as Simpson's Locality 63
Where: Sweetgrass County, Montana (45.8° N, 109.8° W: paleocoordinates 51.8° N, 89.1° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Tiffanian (61.7 - 56.8 Ma)
• in a stratigraphically isolated reversed polarity zone interpreted as chron C26r: Butler et al. 1987
Environment/lithology: terrestrial
Primary reference: D. W. Krause and P. D. Gingerich. 1983. Mammalian Fauna from Douglass Quarry, Earliest Tiffanian (Late Paleocene) of the Eastern Crazy Mountain Basin, Montana. Contributions from the Museum of Paleontology, University of Michigan 26(9):157-196 [J. Alroy/J. Alroy/P. Mannion]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 15025: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by K. Christopher Beard and Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
Ptilodus sp. Cope 1881 multituberculate said to be new; presumably "P. sp. T" of Krause 1987a; two forms according to Krause and Maas 1990
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"Anconodon cochranensis" = Anconodon cochranensis, "Anconodon lewisi" = Anconodon cochranensis2, Anconodon gidleyi6
"Anconodon cochranensis" = Anconodon cochranensis Russell 1929 multituberculate | |
Neoplagiaulax sp.2, Neoplagiaulax hunteri, Neoplagiaulax donaldorum n. sp.6, Neoplagiaulax nelsoni2, ? Mimetodon sp.2, Mesodma pygmaea2, Ectypodus sp.6
Neoplagiaulax hunteri Simpson 1936 multituberculate | |
Bisonalveus browni Gazin 1956 eutherian | |
Paleotomus senior Simpson 1937 eutherian | |
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Leptacodon munusculum Simpson 1935 placental | |
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Thryptacodon ? orthogonius5, Thryptacodon cf. orthogonius5, Chriacus pelvidens, "Arctocyon cf. montanensis" = Arctocyon corrugatus1, Mimotricentes ? tedfordi3, Mimotricentes fremontensis, Colpoclaenus ? keeferi2
Chriacus pelvidens Cope 1881 condylarth
Mimotricentes fremontensis Gazin 1956 condylarth | |
Phenacodus bisonensis Gazin 1956 condylarth
Ectocion collinus Russell 1929 condylarth | |
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Nannodectes intermedius Gazin 1971 primate
Plesiadapis praecursor n. sp. Gingerich 1975 primate | |
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Litomylus dissentaneus Simpson 1935 elephant shrew | |
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Psittacotherium multifragum4 Cope 1882 taeniodont Krause and Maas 1990 do not appear to be aware of this i.d.
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