Douglas Area Upper Chadron (Eocene of the United States)
Where: Converse County, Wyoming (42.9° N, 105.2° W: paleocoordinates 44.4° N, 96.5° W)
• coordinate based on political unit
When: Chadron Formation, Chadronian (37.2 - 33.9 Ma)
Environment/lithology: terrestrial
Primary reference: E. Evanoff, D. R. Prothero, and R. H. Lander. 1992. Elocene-Oligocene climatic change in North America: The White River Formation near Douglass, East-Central Wyoming. 116-130 [J. Alroy/J. Alroy/M. Uhen]more details
PaleoDB collection 16942: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
• tuffs 4 and 5 are above, not correlable with, the F:AM "Upper Puprle White": Larson and Evanoff 1998
between tuffs 4 and 5
between tuffs 4 and 5
Show authors, comments, and common names
| Mammalia | |
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"Titanotheriomys veterior" = Ischyromys veterior Matthew 1903 rodent | |
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Megalagus brachyodon Matthew 1903 rabbit
Megalagus turgidus Cope 1873 rabbit
Palaeolagus haydeni Leidy 1856 rabbit | |
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Hyaenodon crucians Leidy 1853 creodont
Hyaenodon horridus Leidy 1853 creodont | |
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii, Miniochoerus forsythae3, Miniochoerus chadronensis
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont
Miniochoerus chadronensis Schultz and Falkenbach 1956 oreodont includes "Stenopsochoerus douglasensis" Schultz and Falkenbach 1956 from Chadron Fm., UNSM Wyo-3 7 mi SE of Douglas
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Leptomeryx speciosus Lambe 1908 ruminant | |
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Subhyracodon mitis2 Cope 1875 rhinoceros "From the late Chadronian: ... from Douglas, Converse County, Wyoming"
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Brontotheriidae indet. Marsh 1873 brontothere | |
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Leptictis dakotensis Leidy 1868 eutherian | |