Elk Creek (680 m) (Eocene of the United States)

Also known as YPM 3, 31, 33 (= UCMP V96073), 163, 166, 195, 198

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 UCMP

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 15566: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Kinosternoidea
Baptemys sp.3 Leidy 1870 mud turtle
UCMP V96073
 Testudines - Pangeoemydidae
Echmatemys sp.3 Hay 1906 turtle
UCMP V96073
Mammalia
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Absarokius abbotti Loomis 1906 tarsier
OK, B & R 87: Y-3, 31, 195
Absarokius metoecus2 Bown and Rose 1987 tarsier
Y-3
 Primates - Notharctidae
Cantius sp.1 Simons 1962 primate
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
 Rodentia - Sciuravidae
cf. Knightomys depressus Loomis 1907 rodent
 Rodentia - Ischyromyidae
Paramys cf. copei Loomis 1907 rodent
 Perissodactyla - Brontotheriidae
Lambdotherium popoagicum1 Cope 1880 brontothere
 Perissodactyla -
Heptodon posticus Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
 Carnivora -
Vulpavus canavus Cope 1881 carnivoran
 Trogontia - Esthonychidae
Esthonyx acutidens Cope 1881 tillodont
Esthonyx bisulcatus Cope 1874 tillodont
Megalesthonyx hopsoni Rose 1971 tillodont
described by Rose 1972 from YPM 33
 Ungulata - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus powellianus Cope 1884 condylarth
 Ungulata - Homacodontidae
Antiacodon sp.4 Marsh 1872 even-toed ungulate
 Ungulata - Diacodexeidae
"Bunophorus" macropternus Cope 1882 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate
Diacodexis secans Cope 1881 even-toed ungulate
probably OK
 Ungulata - Phenacodontidae
Phenacodus intermedius Granger 1915 condylarth
confirmed by Thewissen 1990
Phenacodus vortmani Cope 1880 condylarth
 Acreodi - Hapalodectidae
Hapalodectes leptognathus Osborn and Wortman 1892 condylarth
 Hyaenodonta - Hyaenodontidae
Prototomus sp. Cope 1874 eutherian
"1"