PBDB Collection

Elk Creek (580 m) (Eocene of the United States)

Also known as YPM 21, 25, 39, 55, 71a, 73, 75, 76, 77, 168, USGS D-1474 (575 m), 1337, 1346, 1431, 1435, 1468

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 15554: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• YPM 55 is from Washakie County

Show authors, comments, and common names

Mammalia
Cimolesta - Apatemyidae	Labidolemur kayi³ Labidolemur kayi³ Simpson 1929 eutherian "Apatemys chardini/bellulus" DUPLICATE REF 1645 or 1646 or 1647 or 1648 or 1649
Cimolesta - Esthonychidae	Esthonyx bisulcatus Esthonyx bisulcatus Cope 1874 tillodont
Condylarthra - Hyopsodontidae	Hyopsodus "latidens/miticulus", Hyopsodus "loomisi/minor", Hyopsodus powellianus Hyopsodus "latidens/miticulus" Leidy 1870 condylarth "latidens/miticulus" Hyopsodus "loomisi/minor" Leidy 1870 condylarth "loomisi/minor" Hyopsodus powellianus Cope 1884 condylarth
Primates - Paromomyidae	Phenacolemurinae indet. Phenacolemurinae indet. Simpson 1955 primate "Phenacolemur sp. 2"
Primates - Omomyidae	Absarokius metoecus², Absarokius abbotti Absarokius metoecus² Bown and Rose 1987 tarsier Y-168 Absarokius abbotti Loomis 1906 tarsier OK, B & R 87: Y-21, 25, 39, 55, 77, 168, USGS D-1337,1346, 1431, 1468, 1474
Primates - Microsyopidae	Microsyopidae indet.¹ Microsyopidae indet.¹ Osborn and Wortman 1892 primate
Primates - Notharctidae	"Pelycodus abditus" = Cantius abditus, Cantius nunienus¹ "Pelycodus abditus" = Cantius abditus Gingerich and Simons 1977 primate Cantius nunienus¹ Cope 1881 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., Ambloctonus sinosus Oxyaena sp. Cope 1874 creodont "intermedia/forcipata" Ambloctonus sinosus Cope 1875 creodont
Creodonta - Hyaenodontidae	Prototomus sp., Tritemnodon strenua Prototomus sp. Cope 1874 creodont "1" Tritemnodon strenua creodont
Ferae -	Oodectes sp.¹, Vulpavus canavus, Vulpavus australis, Miacis sp.¹, Uintacyon asodes Oodectes sp.¹ Wortman 1901 placental Vulpavus canavus Cope 1881 placental Vulpavus australis Matthew and Granger 1915 placental Miacis sp.¹ Cope 1872 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
Leptictida - Leptictidae	Didelphodus absarokae, Palaeictops bicuspis Didelphodus absarokae Cope 1881 eutherian Palaeictops bicuspis Cope 1880 eutherian

¹Alroy 2002; ²Bown and Rose 1987; ³Gingerich 1982