PBDB Collection

Elk Creek (160 m) (Eocene of the United States)

Also known as YPM 91, 145, 146, 327, 362, 364, 374

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. 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 15512: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• questionably correlated: Y-110, Y-147

Show authors, comments, and common names

Mammalia
Cimolesta - Esthonychidae	Esthonyx spatularius Esthonyx spatularius Cope 1880 tillodont
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont "1"
Leptictida - Leptictidae	Prodiacodon tauricinerei Prodiacodon tauricinerei Jepsen 1930 eutherian
Tribosphenida - Pantolestoidae	Palaeosinopa incerta³, Palaeosinopa veterrima Palaeosinopa incerta³ Bown and Schankler 1982 placental "P. sp. 1" Palaeosinopa veterrima Matthew 1901 placental
Creodonta - Oxyaenidae	Oxyaena sp., Oxyaena gulo Oxyaena sp. Cope 1874 creodont "intermedia/forcipata" Oxyaena gulo Matthew and Granger 1915 creodont
Creodonta - Hyaenodontidae	Prototomus sp., Arfia shoshoniensis⁴ Prototomus sp. Cope 1874 creodont "1" Arfia shoshoniensis⁴ Matthew and Granger 1915 creodont
Ferae - Viverravidae	Didymictis leptomylus Didymictis leptomylus Cope 1880 placental
Ferae -	Uintacyon massetericus Uintacyon massetericus Cope 1882 placental
Artiodactyla - Diacodexeidae	Diacodexis sp.¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate
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"
Tribosphenida - Phenacodontidae	Phenacodus intermedius, Phenacodus vortmani, Ectocion osbornianus Phenacodus intermedius Granger 1915 condylarth Phenacodus vortmani Cope 1880 condylarth Ectocion osbornianus Cope 1882 condylarth
Procreodi - Arctocyonidae	Thryptacodon antiquus Thryptacodon antiquus Matthew and Granger 1915 condylarth
Rodentia - Sciuravidae	cf. Knightomys depressus, cf. Knightomys minor¹ cf. Knightomys depressus Loomis 1907 rodent cf. Knightomys minor¹ Wood 1965 rodent
Rodentia - Ischyromyidae	Paramys cf. excavatus, Paramys cf. copei Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Primates - Notharctidae	Cantius sp.¹ Cantius sp.¹ Simons 1962 primate
Primates - Microsyopidae	Microsyopidae indet.¹, Niptomomys doreenae Microsyopidae indet.¹ Osborn and Wortman 1892 primate Niptomomys doreenae McKenna 1960 primate
Primates - Omomyidae	Teilhardina sp.², Tetonius matthewi² Teilhardina sp.² Simpson 1940 tarsier Tetonius matthewi² Bown and Rose 1987 tarsier Y-147
Primates - Paromomyidae	Phenacolemurinae indet.¹ Phenacolemurinae indet.¹ Simpson 1955 primate
Condylarthra - Hyopsodontidae	Hyopsodus sp. Hyopsodus sp. Leidy 1870 condylarth "loomisi/minor"
Macroscelidea - Amphilemuridae	Macrocranion nitens Macrocranion nitens Matthew 1918 elephant shrew
Macroscelidea - Apheliscidae	Apheliscus sp., Haplomylus speirianus Apheliscus sp. Cope 1875 elephant shrew "wapitiensis/insidiosus" Haplomylus speirianus Cope 1880 elephant shrew
Multituberculata - Neoplagiaulacidae	Ectypodus tardus⁶ Ectypodus tardus⁶ Jepsen 1940 multituberculate YM 146
Reptilia
Testudines - Kinosternoidea	Cardichelyon rogerwoodi⁵ Cardichelyon rogerwoodi⁵ Hutchison 2013 mud turtle at UCMP loc V81223 (=Yale 362 extension)

¹Alroy 2002; ²Bown and Rose 1987; ³Bown and Schankler 1982; ⁴Gingerich and Deutsch 1989; ⁵Hutchison 2013; ⁶Krause 1982