Douglas Area Basal Brule (Eocene of the United States)
Where: Converse County, Wyoming (42.9° N, 105.2° W)
• Paleocoordinates: 48.8° N, 88.2° W (Wright 2013)
• coordinate based on political unit
When: basal Member (Brule 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 16943: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Jonathan Marcot
Creative Commons license: CC0 (CC0)
Taxonomic list
• just below to c. 7 meters above tuff 5; Wang 1994 gives this "last titanothere" level as 25 ft, and tuff 5 is clearly his "White Marker" (a.k.a. "White Tuff" of Larson and Evanoff 1998)
dated at 33.91 +/- 0.1 Ma SCLF AA on biotite
dated at 33.91 +/- 0.1 Ma SCLF AA on biotite
Show authors, comments, and common names
| Mammalia | |
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Leptictis dakotensis Leidy 1868 eutherian | |
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Hesperocyon gregarius3 Cope 1873 canid various localities 15, 20, and 25 ft above PWL and 35 ft below "Black Ash" = tuff 6a (?)
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Hyaenodon crucians Leidy 1853 creodont
Hyaenodon horridus Leidy 1853 creodont | |
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Brontotheriidae indet. Marsh 1873 brontothere | |
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Poebrotherium wilsoni Leidy 1847 camel | |
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii, "Miniochoerus chadronensis" = Miniochoerus chadronensis, "Parastenopsochoerus conversensis n. sp." = Miniochoerus chadronensis2, "Stenopsochoerus (Pseudostenopsochoerus) douglasensis n. sp." = Miniochoerus chadronensis2
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont
"Miniochoerus chadronensis" = Miniochoerus chadronensis Schultz and Falkenbach 1956 oreodont
"Parastenopsochoerus conversensis n. sp." = Miniochoerus chadronensis2 Schultz and Falkenbach 1956 oreodont
"Stenopsochoerus (Pseudostenopsochoerus) douglasensis n. sp." = Miniochoerus chadronensis2 Schultz and Falkenbach 1956 oreodont | |
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Leptomeryx speciosus Lambe 1908 ruminant | |
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Megalagus turgidus Cope 1873 rabbit
Palaeolagus intermedius Matthew 1899 rabbit
Palaeolagus haydeni Leidy 1856 rabbit | |