Douglas Area Basal Brule: Chadronian, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Leptictidae
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Leptictis dakotensis
(Leidy 1868)
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Mammalia
- Creodonta
- Hyaenodontidae
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Hyaenodon crucians
Leidy 1853
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Hyaenodon horridus
Leidy 1853
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Mammalia
- Carnivora
- Canidae
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Hesperocyon gregarius
(Cope 1873)
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Wang 1994 | |||||||||
various localities 15, 20, and 25 ft above PWL and 35 ft below "Black Ash" = tuff 6a (?) | ||||||||||
Mammalia
- Perissodactyla
- Brontotheriidae
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Brontotheriidae indet.
(Marsh 1873)
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Mammalia
- Merycoidodontidae
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Miniochoerus chadronensis
(Schultz and Falkenbach 1956)
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Stenopsochoerus (Pseudostenopsochoerus) douglasensis n. sp.
Schultz and Falkenbach 1956
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Schultz and Falkenbach 1956 | |||||||||
synonym of Miniochoerus chadronensis | ||||||||||
Parastenopsochoerus conversensis n. sp.
Schultz and Falkenbach 1956
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Schultz and Falkenbach 1956 | |||||||||
synonym of Miniochoerus chadronensis | ||||||||||
Merycoidodon culbertsoni
(Leidy 1848)
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original and current combination Merycoidodon culbertsonii | ||||||||||
Mammalia
- Camelidae
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Poebrotherium eximium
Hay 1902
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see also Prothero 1996d | ||||||||||
Poebrotherium wilsoni
Leidy 1847
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Mammalia
- Protoceratidae
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Leptotragulus sp.
Scott and Osborn 1887
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= Protoceratidae indet.
Marsh 1891
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Alroy 2002 | |||||||||
Mammalia
- Leptomerycidae
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Leptomeryx speciosus
Lambe 1908
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Mammalia
- Lagomorpha
- Leporidae
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Megalagus turgidus
(Cope 1873)
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Palaeolagus haydeni
Leidy 1856
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Palaeolagus intermedius
Matthew 1899
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Mammalia
- Rodentia
- Eomyidae
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Yoderimys sp.
Wood 1955
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= Yoderimyinae indet.
Wood 1955
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Alroy 2002 | |||||||||
Yoderimys bumpi n. gen., n. sp.
Wood 1955
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Wood 1955 | |||||||||
Mammalia
- Rodentia
- Ischyromyidae
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Ischyromys parvidens
Miller and Gidley 1920
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= Ischyromys sp.
Leidy 1856
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Alroy 2002 | |||||||||
also listed by Heaton 1993 from Orellan of "Douglas WY" | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Wyoming | County: | Converse |
Coordinates: | 42.9° North, 105.2° West (view map) | ||||
Paleocoordinates: | 44.4° North, 96.5° West | ||||
Basis of coordinate: | based on political unit |
Time
Period: | Paleogene | Epoch: | Eocene |
Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
*Period: | Tertiary | ||
Key time interval: | Chadronian | ||
Age range of interval: | 37.00000 - 33.90000 m.y. ago | ||
* legacy (obsolete) database fields |
Lithology and environment
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Collection methods and comments
Taxonomic list comments: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 |
Metadata
Database number: | 16943 | ||
Authorizer: | J. Alroy, J. Marcot | Enterer: | J. Alroy, J. Marcot | Research group: | vertebrate |
Created: | 1994-04-30 00:00:00 | Last modified: | 2002-06-03 03:27:41 |
Access level: | the public | Released: | 1994-04-30 00:00:00 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
1470. | 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] |
Secondary references:
6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
3068 | C. B. Schultz and C. H. Falkenbach. 1956. Miniochoerinae and Oreonetinae two new subfamilies of oreodonts. Bulletin of the American Museum of Natural History 109(4):373-482 [J. Alroy/J. Alroy/J. Marcot] | |
6226 | X. Wang. 1994. Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 221:1-207 [J. Alroy/J. Alroy/J. Alroy] | |
3729 | A. E. Wood. 1955. Rodents from the lower Oligocene Yoder Formation of Wyoming. Journal of Paleontology 29(3):519-524 [J. Alroy/J. Alroy/M. Carrano] |