Elk Creek (100 m): Wasatchian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Leptictidae
Prodiacodon tauricinerei (Jepsen 1930)
Didelphodus absarokae (Cope 1881)
Mammalia - Coryphodontidae
Coryphodon sp. (Owen 1845)
original and current combination Lophiodon (Coryphodon)
"2"
Coryphodon sp. (Owen 1845)
original and current combination Lophiodon (Coryphodon)
"1"
Mammalia - Esthonychidae
Esthonyx spatularius Cope 1880
Mammalia
Esthonyx grangeri Simpson 1937
recombined as Azygonyx grangeri
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870
"loomisi/minor"
Mammalia - Macroscelidea - Apheliscidae
Apheliscus sp. Cope 1875
"wapitiensis/insidiosus"
Haplomylus speirianus (Cope 1880)
Mammalia - Acreodi - Mesonychidae
Pachyaena ossifraga Cope 1874
Mammalia - Phenacodontidae
Ectocion osbornianus (Cope 1882)
Phenacodus brachypternus Cope 1882
    = Copecion brachypternus Cope 1882
Alroy 2002
Phenacodus primaevus (Cope 1873)
    = Phenacodus sp. Cope 1873
Alroy 2002
Phenacodus vortmani (Cope 1880)
Phenacodus intermedius Granger 1915
Mammalia - Perissodactyla - Equidae
Hyracotherium grangeri Gingerich 1989
recombined as Sifrhippus grangeri
"H. sp. 1"
Mammalia - Procreodi - Arctocyonidae
Chriacus gallinae Matthew and Granger 1915
Thryptacodon antiquus Matthew and Granger 1915
Mammalia - Diacodexeidae
Diacodexis metsiacus (Cope 1882)
    = Diacodexis sp. Cope 1882
Alroy 2002
Mammalia - Viverravidae
Viverravus sp. Marsh 1872
"V. acutus/gracilis"
Viverravus sp. Marsh 1872
"2"
Didymictis leptomylus Cope 1880
Mammalia
Uintacyon massetericus (Cope 1882)
Mammalia - Creodonta - Oxyaenidae
listed also by Gunnell and Gingerich 1991
Mammalia - Creodonta
Prolimnocyon atavus Matthew and Granger 1915
Mammalia - Creodonta - Hyaenodontidae
Prototomus sp. Cope 1874
"1"
Arfia opisthotoma (Matthew 1901)
    = Arfia sp. Van Valen 1965
Alroy 2002
Mammalia - Pantolestidae
Palaeosinopa veterrima Matthew 1901
Mammalia - Rodentia - Sciuravidae
cf. Knightomys depressus (Loomis 1907)
Dawsonomys minor Wood 1965
    = cf. Knightomys minor Wood 1965
Alroy 2002
Mammalia - Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907
Paramys cf. copei Loomis 1907
Mammalia - Primates - Paromomyidae
Ignacius graybullianus Bown and Rose 1976
Phenacolemur praecox Matthew 1915
    = Phenacolemurinae indet. Simpson 1955
Alroy 2002
Phenacolemur simonsi Bown and Rose 1976
Mammalia - Primates - Omomyidae
Tetonoides tenuiculus (Jepsen 1930)
    = Teilhardina sp. Simpson 1940
Bown and Rose 1987
T. crassidens-americana intergrade; Y-119, 203, 205
Tetonius homunculus (Cope 1882)
    = Tetonius sp. Matthew 1915
Alroy 2002
Mammalia - Primates - Notharctidae
Pelycodus sp. Cope 1875
    = Cantius sp. Simons 1962
Alroy 2002
"mckennai/trigonodus"
Mammalia - Primates - Microsyopidae
Microsyops sp. Leidy 1872
    = Microsyopidae indet. Osborn and Wortman 1892
Alroy 2002
Mammalia - Multituberculata - Eucosmodontidae
Neoliotomus ultimus (Granger and Simpson 1928)
original and current combination Eucosmodon ultimus
described by Krause 1982 from YPM 90b and 119
see common names

Geography
Country:United States State/province:Wyoming County:Big Horn
Coordinates: 44.5° North, 108.0° West (view map)
Paleocoordinates:49.2° North, 90.8° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
Stage:Ypresian 10 m.y. bin:Cenozoic 2
*Period:Tertiary
Key time interval:Wasatchian
Age range of interval:54.90000 - 50.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Willwood
Local section:ElkCr Local bed:100 m
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:all of the YPM localities are in Big Horn County
Metadata
Also known as:YPM 90b, 90c, 119, 120, 201, 202, 203, 204, 205
Database number:15507
Authorizer:J. Alroy Enterer:J. Alroy
Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2002-06-03 03:27:40
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
3021. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1123 T. M. Bown and K. D. Rose. 1987. Patterns of Dental Evolution in Early Eocene Anaptomorphine Primates (Omomyidae) from the Bighorn Basin, Wyoming. Paleontological Society Memoir 23:1-162 [J. Alroy/J. Alroy/J. Ju]