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/M. Uhen]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??
Show authors, comments, and common names
Mammalia
 Condylarthra - Hyopsodontidae
Hyopsodus sp., Hyopsodus cf. minor
Hyopsodus sp. Leidy 1870 condylarth
Hyopsodus cf. minor Loomis 1905 condylarth
 Theriamorpha - Viverravidae
Viverravus sp., Didymictis sp.
Viverravus sp. Marsh 1872 placental
Didymictis sp. Cope 1875 placental
 Theriamorpha -
Miacis cf. exiguus, Vulpavus sp.
Miacis cf. exiguus Matthew and Granger 1915 placental
Vulpavus sp. Marsh 1871 placental
 Carnivora - Miacidae
Miacidae indet.
Miacidae indet. Cope 1880 carnivoran
 Creodonta - Hyaenodontidae
Tritemnodon sp., Prototomus mordax
Tritemnodon sp. Matthew 1906 creodont
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus, Bunophorus sp., "Diacodexis robustus" = Bunophorus robustus
Diacodexis metsiacus Cope 1882 even-toed ungulate
Bunophorus sp. Sinclair 1914 even-toed ungulate
"Diacodexis robustus" = Bunophorus robustus Sinclair 1914 even-toed ungulate
 Procreodi - Arctocyonidae
Chriacus sp., Anacodon ursidens
Chriacus sp. Cope 1883 condylarth
said to be new
Anacodon ursidens Cope 1882 condylarth
 Theriamorpha - Phenacodontidae
Phenacodus vortmani
Phenacodus vortmani Cope 1880 condylarth
 Perissodactyla - Helaletidae
Helaletidae indet.
Helaletidae indet. Osborn 1892 odd-toed ungulate
new helaletid of Bown
 Perissodactyla - Palaeotheriidae
Hyracotherium sp.
Hyracotherium sp. Owen 1841 odd-toed ungulate
probably OK
 Perissodactyla - Equidae
Xenicohippus grangeri
Xenicohippus grangeri Bown and Kihm 1981 horse
 Theriamorpha - Pantolestoidae
Palaeosinopa veterrima
Palaeosinopa veterrima Matthew 1901 placental
 Primates - Omomyidae
Absarokius metoecus
Absarokius metoecus Bown and Rose 1987 tarsier
confirmed by B & R 1987
 Primates - Microsyopidae
Microsyops latidens
Microsyops latidens Cope 1882 primate
 Cimolesta - Esthonychidae
Esthonyx cf. bisulcatus
Esthonyx cf. bisulcatus Cope 1874 tillodont
 Cimolesta - Coryphodontidae
Coryphodon sp.
Coryphodon sp. Owen 1845 pantodont
 Theriamorpha - Leptictidae
Didelphodus absarokae
Didelphodus absarokae Cope 1881 eutherian