PBDB Collection

Elk Creek (560 m) (Eocene of the United States)

Also known as YPM 34, 41, 42, 43, 44, 61, 72, 99, 318, USGS D-1229

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 15551: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• YPM 41, 42, 43, 72, USGS D-1229 are from Washakie County
most or all of these are probably at the 481 m level of Bown et al. 1994
USGS D-1602, 1603, 1604 are also at the 481/560 level: B & R 87

Show authors, comments, and common names

Mammalia
Cimolesta - Coryphodontidae	Coryphodon "sp. 2", Coryphodon "sp. 3" Coryphodon "sp. 2" Owen 1845 pantodont "2" Coryphodon "sp. 3" Owen 1845 pantodont "3"
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Macroscelidea - Amphilemuridae	Macrocranion nitens Macrocranion nitens Matthew 1918 elephant shrew
Macroscelidea - Apheliscidae	Apheliscus sp. Apheliscus sp. Cope 1875 elephant shrew "1"
Condylarthra - Hyopsodontidae	Hyopsodus "latidens/miticulus", Hyopsodus "loomisi/minor" Hyopsodus "latidens/miticulus" Leidy 1870 condylarth "latidens/miticulus" Hyopsodus "loomisi/minor" Leidy 1870 condylarth "loomisi/minor"
Primates - Paromomyidae	Phenacolemurinae indet. Phenacolemurinae indet. Simpson 1955 primate "Phenacolemur sp. 1" and "P. sp. 2"
Primates - Omomyidae	Tetonius sp.¹, Absarokius metoecus², Absarokius abbotti² Tetonius sp.¹ Matthew 1915 tarsier Absarokius metoecus² Bown and Rose 1987 tarsier Y-61, USGS D-1602, 1603 Absarokius abbotti² Loomis 1906 tarsier Y-34, 44, 318, USGS D-1229, 1603, 1604
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Primates - Notharctidae	"Pelycodus frugivorus" = Cantius frugivorus, "Pelycodus abditus" = Cantius abditus "Pelycodus frugivorus" = Cantius frugivorus Cope 1875 primate "Pelycodus abditus" = Cantius abditus Gingerich and Simons 1977 primate
Rodentia - Ischyromyidae	cf. Mytonomys coloradensis¹, Paramys cf. excavatus, Paramys cf. copei cf. Mytonomys coloradensis¹ Wood 1962 rodent Paramys cf. excavatus Loomis 1907 rodent Paramys cf. copei Loomis 1907 rodent
Rodentia - Sciuravidae	cf. Knightomys depressus cf. Knightomys depressus Loomis 1907 rodent
Creodonta - Oxyaenidae	Oxyaena sp. Oxyaena sp. Cope 1874 creodont "intermedia/forcipata"
Creodonta - Hyaenodontidae	Prototomus sp., Tritemnodon strenua Prototomus sp. Cope 1874 creodont "1" Tritemnodon strenua creodont ref 6294: and "T. hians"
Ferae -	Vulpavus australis, Miacis sp.¹, Vassacyon promicrodon, Uintacyon asodes Vulpavus australis Matthew and Granger 1915 placental Miacis sp.¹ Cope 1872 placental Vassacyon promicrodon Wortman and Matthew 1899 placental Uintacyon asodes Gazin 1952 placental
Ferae - Viverravidae	Viverravus sp., Didymictis sp. Viverravus sp. Marsh 1872 placental "V. acutus/gracilis" Didymictis sp. Cope 1875 placental "curtidens/lysitensis"
Tribosphenida - Phenacodontidae	Phenacodus vortmani, "Phenacodus brachypternus" = Copecion brachypternus Phenacodus vortmani Cope 1880 condylarth "Phenacodus brachypternus" = Copecion brachypternus Cope 1882 condylarth
Perissodactyla -	Heptodon calciculus 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
Procreodi - Arctocyonidae	Anacodon ursidens, Chriacus gallinae Anacodon ursidens Cope 1882 condylarth Chriacus gallinae Matthew and Granger 1915 condylarth
Artiodactyla - Diacodexeidae	Diacodexis sp.¹, Bunophorus sp.¹ Diacodexis sp.¹ Cope 1882 even-toed ungulate Bunophorus sp.¹ Sinclair 1914 even-toed ungulate
Tribosphenida - Pantolestoidae	Palaeosinopa veterrima Palaeosinopa veterrima Matthew 1901 placental
Leptictida - Leptictidae	Palaeictops bicuspis Palaeictops bicuspis Cope 1880 eutherian
Tribosphenida - Peradectidae	Peradectes chesteri Peradectes chesteri Gazin 1952 marsupial

¹Alroy 2002; ²Bown and Rose 1987