Elk Creek (550 m) (Eocene of the United States)

Also known as YPM 63, 100

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

• Paleocoordinates: 52.2° N, 79.9° W (Wright 2013)

• coordinate based on political unit

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (54.9 - 50.5 Ma)

Environment/lithology: terrestrial

Primary reference: D. M. Schankler. 1980. Faunal Zonation of the Willwood Formation in the Central Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology 24:99-114 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 15550: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC0 (CC0)

Taxonomic list

• status of this list is seriously in question because Bown et al. 1994 give no meter level for YPM 63 and an incongruent level of 455 m (= old 534) for YPM 100
Show authors, comments, and common names
Mammalia
 Condylarthra - Hyopsodontidae
Hyopsodus sp., Hyopsodus sp.
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Rodentia - Ischyromyidae
Paramys cf. excavatus
Paramys cf. excavatus Loomis 1907 rodent
 Primates - Microsyopidae
Microsyopidae indet.1
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Absarokius abbotti2, Tetonius sp.1
Absarokius abbotti2 Loomis 1906 tarsier
Y-100
Tetonius sp.1 Matthew 1915 tarsier
 Primates - Notharctidae
Cantius abditus1
Cantius abditus1 Gingerich and Simons 1977 primate
 Creodonta - Hyaenodontidae
Prototomus sp.
Prototomus sp. Cope 1874 creodont
"1"
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
 Tribosphenida - Phenacodontidae
Phenacodus vortmani
Phenacodus vortmani Cope 1880 condylarth
 Procreodi - Arctocyonidae
Anacodon ursidens
Anacodon ursidens Cope 1882 condylarth
1Alroy 2002; 2Bown and Rose 1987