Elk Creek (570 m) (Eocene of the United States)

Also known as YPM 18a, 26a-d, 27, Pelycodus Loc., 28, 56, 59, 66, 70, 71b, 74, 317, USGS D-1469 (565 m), 1163, 1338, 1345

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 15553: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• USGS 1346 is listed twice, here with an asterisk and at 580 without
USGS D-1163 is from Washakie County
Reptilia
 Testudines - Kinosternoidea
Baltemys staurogastros3 Hutchison 1991 mud turtle
 Testudines -
Planetochelys dithyros4 Hutchison 2013 turtle
at UCMP loc V80007 (=Yale 27)
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
"2"
Coryphodon sp. Owen 1845 pantodont
"3"
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Leptictida - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Primates - Microsyopidae
Microsyopidae indet.1 Osborn and Wortman 1892 primate
 Primates - Omomyidae
Tetonius sp.1 Matthew 1915 tarsier
Absarokius abbotti2 Loomis 1906 tarsier
Y-28, USGS D-1163, 1338, 1345, 1469
Absarokius metoecus2 Bown and Rose 1987 tarsier
Y-27, 28, 56, USGS D-1469
 Primates - Notharctidae
Cantius sp. Simons 1962 primate
"Pelycodus" frugivorus and "Copelemur consortutus"; not clear if this represents Cantius frugivorus or C. nunienus, which are said to be a single lineage by Godinot 1998
Cantius abditus1 Gingerich and Simons 1977 primate
 Primates - Paromomyidae
Phenacolemurinae indet. Simpson 1955 primate
"Phenacolemur sp. 2"
 Rodentia - Sciuravidae
cf. Knightomys minor1 Wood 1965 rodent
 Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907 rodent
Paramys cf. copei Loomis 1907 rodent
cf. Mytonomys coloradensis1 Wood 1962 rodent
 Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870 condylarth
"latidens/miticulus"
Hyopsodus sp. Leidy 1870 condylarth
"loomisi/minor"
 Tribosphenida - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Perissodactyla -
Heptodon calciculus Cope 1880 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium aemulor" = Arenahippus aemulor, "Hyracotherium cf. index" = Minippus index
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"H. sp. 1"
"Hyracotherium aemulor" = Arenahippus aemulor Gingerich 1991 horse
"H. sp. 2"
"Hyracotherium cf. index" = Minippus index Cope 1873 horse
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
"intermedia/forcipata"
 Ferae - Viverravidae
Didymictis sp. Cope 1875 placental
"curtidens/lysitensis"
Viverravus sp. Marsh 1872 placental
"V. acutus/gracilis"
 Ferae -
Uintacyon asodes Gazin 1952 placental
 Carnivora - Miacidae
Miacis sp.1 Cope 1872 carnivoran
 Carnivora -
Vulpavus australis Matthew and Granger 1915 carnivoran
Vulpavus canavus Cope 1881 carnivoran
 Macroscelidea - Apheliscidae
Apheliscus sp. Cope 1875 elephant shrew
"1"
 Tribosphenida - Arctocyonidae
Anacodon ursidens Cope 1882 condylarth
Chriacus gallinae Matthew and Granger 1915 condylarth
 Acreodi - Hapalodectidae
Hapalodectes leptognathus Osborn and Wortman 1892 condylarth
 Hyaenodonta - Hyaenodontidae
Prototomus sp. Cope 1874 eutherian
"1"
 Hyaenodonta -
Didelphodus absarokae Cope 1881 eutherian
 Artiodactyla - Diacodexeidae
Bunophorus sp.1 Sinclair 1914 even-toed ungulate
Diacodexis sp.1 Cope 1882 even-toed ungulate