PBDB Collection

Elk Creek (140 m) (Eocene of the United States)

Also known as YPM 92, 93, 94, 96, 97, 97a, 104, 106, 206, 207, 341, 346, 358, 359, 382, 383, USGS 1640

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 15510: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC0 (CC0)

Taxonomic list

• all of these localities are in Big Horn County

Show authors, comments, and common names

Mammalia
Tribosphenida - Herpetotheriidae	Peratherium comstocki Peratherium comstocki Cope 1884 marsupial
Tribosphenida - Peradectidae	Mimoperadectes labrus, Peradectes chesteri Mimoperadectes labrus Bown and Rose 1979 marsupial Peradectes chesteri Gazin 1952 marsupial
Cimolesta -	"Esthonyx grangeri" = Azygonyx grangeri "Esthonyx grangeri" = Azygonyx grangeri Simpson 1937 tillodont
Cimolesta - Esthonychidae	Esthonyx spatularius Esthonyx spatularius Cope 1880 tillodont
Cimolesta - Apatemyidae	Labidolemur kayi⁴ Labidolemur kayi⁴ Simpson 1929 eutherian "Apatemys DUPLICATE REF 1645 or 1646 or 1647 or 1648 or 1649
Cimolesta - Coryphodontidae	Coryphodon sp., Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "2" Coryphodon sp. Owen 1845 pantodont "1"
Leptictida - Leptictidae	Prodiacodon tauricinerei, Didelphodus absarokae Prodiacodon tauricinerei Jepsen 1930 eutherian Didelphodus absarokae Cope 1881 eutherian
Condylarthra - Hyopsodontidae	Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "loomisi/minor"
Macroscelidea - Apheliscidae	Apheliscus sp., Haplomylus speirianus Apheliscus sp. Cope 1875 elephant shrew "wapitiensis/insidiosus" Haplomylus speirianus Cope 1880 elephant shrew
Macroscelidea - Amphilemuridae	Macrocranion nitens Macrocranion nitens Matthew 1918 elephant shrew
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Rodentia - Sciuravidae	Sciuravidae indet., cf. Knightomys minor¹, cf. Knightomys depressus Sciuravidae indet. Miller and Gidley 1918 rodent "1" cf. Knightomys minor¹ Wood 1965 rodent cf. Knightomys depressus Loomis 1907 rodent
Rodentia - Paramyidae	Franimys amherstensis Franimys amherstensis Wood 1962 rodent
Primates - Omomyidae	Tetonius matthewi², Teilhardina sp.² Tetonius matthewi² Bown and Rose 1987 tarsier Teilhardina sp.² Simpson 1940 tarsier
Primates - Paromomyidae	Ignacius graybullianus, Phenacolemurinae indet.¹, Phenacolemur simonsi Ignacius graybullianus Bown and Rose 1976 primate Phenacolemurinae indet.¹ Simpson 1955 primate Phenacolemur simonsi Bown and Rose 1976 primate
Primates - Microsyopidae	Microsyopidae indet.¹, Niptomomys doreenae Microsyopidae indet.¹ Osborn and Wortman 1892 primate Niptomomys doreenae McKenna 1960 primate
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Primates - Micromomyidae	Tinimomys graybulliensis Tinimomys graybulliensis Szalay 1974 primate
Dermoptera -	Plagiomene multicuspis Plagiomene multicuspis Matthew 1918 colugo
Tribosphenida - Pantolestoidae	Palaeosinopa lutreola, Palaeosinopa veterrima, Palaeosinopa incerta³ Palaeosinopa lutreola Matthew 1918 placental Palaeosinopa veterrima Matthew 1901 placental Palaeosinopa incerta³ Bown and Schankler 1982 placental "P. sp. 1"
Tribosphenida -	Talpavoides dartoni³ Talpavoides dartoni³ Bown and Schankler 1982 placental YPM 104; "Dormaaliidae indet."
Soricomorpha - Nyctitheriidae	Plagioctenodon savagei³ Plagioctenodon savagei³ Bown and Schankler 1982 placental "P. sp. 1"
Soricomorpha - Geolabididae	Centetodon patratus³ Centetodon patratus³ Bown and Schankler 1982 placental "C. sp. 1/2"
Tribosphenida - Phenacodontidae	Phenacodus intermedius, Phenacodus vortmani, Ectocion osbornianus, Copecion brachypternus¹ Phenacodus intermedius Granger 1915 condylarth Phenacodus vortmani Cope 1880 condylarth Ectocion osbornianus Cope 1882 condylarth Copecion brachypternus¹ Cope 1882 condylarth
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"
Artiodactyla - Diacodexeidae	Diacodexis sp.¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate
Procreodi - Arctocyonidae	Thryptacodon antiquus Thryptacodon antiquus Matthew and Granger 1915 condylarth
Acreodi - Mesonychidae	Pachyaena gracilis⁶, Pachyaena ossifraga Pachyaena gracilis⁶ Matthew and Granger 1915 condylarth USGS D-1640, 140 m level Pachyaena ossifraga Cope 1874 condylarth
Ferae -	Uintacyon massetericus Uintacyon massetericus Cope 1882 placental
Ferae - Viverravidae	Viverravus sp., Viverravus sp., Viverravus sp., Didymictis leptomylus Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Viverravus sp. Marsh 1872 placental "2" Viverravus sp. Marsh 1872 placental "3" Didymictis leptomylus Cope 1880 placental
Ferae - Oxyaenidae	Oxyaena sp., Oxyaena gulo, Palaeonictis occidentalis Oxyaena sp. Cope 1874 placental "intermedia/forcipata" Oxyaena gulo Matthew and Granger 1915 placental Palaeonictis occidentalis Osborn 1892 placental
Hyaenodonta - Hyaenodontidae	Prototomus sp., Arfia shoshoniensis⁵ Prototomus sp. Cope 1874 placental "1" Arfia shoshoniensis⁵ Matthew and Granger 1915 placental
Hyaenodonta -	Prolimnocyon atavus Prolimnocyon atavus Matthew and Granger 1915 placental
Ferae - Metacheiromyidae	Palaeanodon sp., Palaeanodon ignavus Palaeanodon sp. Matthew 1918 placental "1" Palaeanodon ignavus Matthew 1918 placental

¹Alroy 2002; ²Bown and Rose 1987; ³Bown and Schankler 1982; ⁴Gingerich 1982; ⁵Gingerich and Deutsch 1989; ⁶O'Leary and Rose 1995