Elk Creek (450 m) (Eocene of the United States)

Also known as YPM 51, 65, 78, 222, 223, 237, 247, 261, 267, 340-S, USGS D-1599 (449 m)

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

Primary reference: D. M. Schankler. 1980. University of Michigan Papers on Paleontology 24 [J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15542: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS D-1599 is from Washakie County
Mammalia
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Absarokius metoecus2 Bown and Rose 1987 tarsier
USGS D-1599
Steinius vespertinus2 Matthew 1915 tarsier
Y-340-S
 Primates - Notharctidae
Cantius abditus1 Gingerich and Simons 1977 primate
 Primates - Paromomyidae
Phenacolemurinae indet. Simpson 1955 primate
"Phenacolemur sp. 1"
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Cimolesta - Pantolestidae
Palaeosinopa veterrima Matthew 1901 eutherian
Palaeosinopa lutreola Matthew 1918 eutherian
Palaeosinopa incerta3 Bown and Schankler 1982 eutherian
"P. sp. 1"
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
 Perissodactyla -
Systemodon sp.4 Cope 1881 odd-toed ungulate
USGS, locality not stated
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium aemulor" = Arenahippus aemulor
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
"H. sp. 2"
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
"intermedia/forcipata"
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
 Ferae -
Uintacyon asodes Gazin 1952 placental
Vassacyon promicrodon Wortman and Matthew 1899 placental
 Carnivora -
Vulpavus australis Matthew and Granger 1915 carnivoran
 Trogontia - Esthonychidae
Esthonyx sp. Cope 1874 tillodont
"1"
Esthonyx bisulcatus Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
Anacodon ursidens Cope 1882 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Ungulata - Diacodexeidae
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Copecion brachypternus1 Cope 1882 condylarth
Phenacodus sp.1 Cope 1873 condylarth
 Hyaenodonta -
Prolimnocyon atavus Matthew and Granger 1915 eutherian