Elk Creek (490 m) (Eocene of the United States)

Also known as YPM 49, 69

Where: Washakie County, Wyoming (44.0° N, 108.0° W: paleocoordinates 48.7° N, 90.9° 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 15546: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• YPM 69 is in Big Horn County
Mammalia
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Cimolesta - Pantolestidae
Palaeosinopa veterrima Matthew 1901 eutherian
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Absarokius metoecus2 Bown and Rose 1987 tarsier
Y-49
 Primates - Notharctidae
Cantius abditus1 Gingerich and Simons 1977 primate
 Primates - Paromomyidae
Phenacolemurinae indet. Simpson 1955 primate
"Phenacolemur sp. 2"
 Rodentia - Ischyromyidae
Paramys cf. copei Loomis 1907 rodent
 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"
 Carnivora -
Vulpavus australis Matthew and Granger 1915 carnivoran
 Hyaenodonta - Hyaenodontidae
Didelphodus absarokae Cope 1881 eutherian
 Artiodactyla - Diacodexeidae
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate