Dry Cottonwood Bonanza (Eocene of the United States)

Also known as USGS Loc. D-1326

Where: Big Horn County, Wyoming (44.5° N, 108.0° W: paleocoordinates 49.2° N, 90.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Reposited in the USGS

Primary reference: T. M. Bown, K. D. Rose, E. L. Simons and S. L. Wing. 1994. Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman formations, southern Bighorn Basin, Wyoming. United States Geological Survey Professional Paper 1540:1-103 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15575: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• placed in Bown section by Bown et al.
"Absarokius abbotti" was reported by Bown and Rose 1987 but is omitted; discussed in text??
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Cimolesta - Pantolestidae
Palaeosinopa veterrima Matthew 1901 eutherian
 Primates - Microsyopidae
Microsyops latidens Cope 1882 primate
 Primates - Omomyidae
Absarokius metoecus Bown and Rose 1987 tarsier
confirmed by B & R 1987
 Perissodactyla - Helaletidae
Helaletidae indet. Osborn 1892 odd-toed ungulate
new helaletid of Bown
 Perissodactyla - Equidae
Xenicohippus grangeri Bown and Kihm 1981 horse
 Perissodactyla - Palaeotheriidae
Hyracotherium sp. Owen 1841 odd-toed ungulate
probably OK
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
Viverravus sp. Marsh 1872 placental
 Carnivora - Miacidae
Miacidae indet. Cope 1880 carnivoran
Miacis cf. exiguus Matthew and Granger 1915 carnivoran
 Carnivora -
Vulpavus sp. Marsh 1871 carnivoran
 Tillodontia - Esthonychidae
Esthonyx cf. bisulcatus Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
Anacodon ursidens Cope 1882 condylarth
Chriacus sp. Cope 1883 condylarth
said to be new
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
Hyopsodus cf. minor Loomis 1905 condylarth
 Ungulata - Diacodexeidae
Bunophorus sp. Sinclair 1914 even-toed ungulate
Bunophorus robustus Sinclair 1914 even-toed ungulate
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Hyaenodonta - Hyaenodontidae
Galecyon mordax Matthew and Granger 1915 eutherian
Tritemnodon sp. Matthew 1906 eutherian
 Hyaenodonta -
Didelphodus absarokae Cope 1881 eutherian