Elk Creek (140 m): Wasatchian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
Mimoperadectes labrus Bown and Rose 1979
Peradectes chesteri (Gazin 1952)
Peratherium comstocki Cope 1884
Mammalia - Macroscelidea - Amphilemuridae
Macrocranion nitens (Matthew 1918)
Mammalia - Macroscelidea - Apheliscidae
Apheliscus sp. Cope 1875
"wapitiensis/insidiosus"
Haplomylus speirianus (Cope 1880)
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870
"loomisi/minor"
Mammalia - Phenacodontidae
Phenacodus vortmani (Cope 1880)
Phenacodus intermedius Granger 1915
Ectocion osbornianus (Cope 1882)
Phenacodus brachypternus Cope 1882
    = Copecion brachypternus Cope 1882
Alroy 2002
Mammalia - Perissodactyla - Equidae
Hyracotherium aemulor Gingerich 1991
recombined as Arenahippus aemulor
"H. sp. 2"
Hyracotherium grangeri Gingerich 1989
recombined as Sifrhippus grangeri
"H. sp. 1"
Mammalia - Diacodexeidae
Diacodexis metsiacus (Cope 1882)
    = Diacodexis sp. Cope 1882
Alroy 2002
Mammalia - Procreodi - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915
Mammalia - Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874
"intermedia/forcipata"
Palaeonictis occidentalis Osborn 1892
Mammalia - Creodonta
Prolimnocyon atavus Matthew and Granger 1915
Mammalia - Creodonta - Hyaenodontidae
Arfia opisthotoma (Matthew 1901)
    = Arfia shoshoniensis Matthew and Granger 1915
Gingerich and Deutsch 1989
at YM 97, 382
Prototomus sp. Cope 1874
"1"
Mammalia - Viverravidae
Didymictis leptomylus Cope 1880
Viverravus sp. Marsh 1872
"V. acutus/gracilis"
Viverravus sp. Marsh 1872
"2"
Viverravus sp. Marsh 1872
"3"
Mammalia
Uintacyon massetericus (Cope 1882)
Mammalia - Metacheiromyidae
Palaeanodon sp. Matthew 1918
"1"
Palaeanodon ignavus Matthew 1918
Mammalia - Acreodi - Mesonychidae
Pachyaena ossifraga Cope 1874
Pachyaena gracilis Matthew and Granger 1915
O'Leary and Rose 1995
USGS D-1640, 140 m level
Mammalia - Nyctitheriidae
Plagioctenodon savagei Bown and Schankler 1982
Bown and Schankler 1982
"P. sp. 1"
Mammalia - Geolabididae
Centetodon patratus Bown and Schankler 1982
Bown and Schankler 1982
"C. sp. 1/2" (1 measurement)
Mammalia
Talpavoides dartoni Bown and Schankler 1982
Bown and Schankler 1982
YPM 104; "Dormaaliidae indet."
Mammalia - Pantolestidae
Palaeosinopa incerta Bown and Schankler 1982
Bown and Schankler 1982
"P. sp. 1"
Palaeosinopa lutreola Matthew 1918
Palaeosinopa veterrima Matthew 1901
Mammalia - Rodentia - Ischyromyidae
Paramys cf. excavatus Loomis 1907
Paramys cf. copei Loomis 1907
Mammalia - Rodentia - Paramyidae
Franimys amherstensis Wood 1962
(3 measurements)
Mammalia - Rodentia - Sciuravidae
Sciuravidae indet. Miller and Gidley 1918
"1"
cf. Knightomys depressus (Loomis 1907)
Dawsonomys minor Wood 1965
    = cf. Knightomys minor Wood 1965
Alroy 2002
Mammalia - Dermoptera
Plagiomene multicuspis Matthew 1918
Mammalia - Primates - Microsyopidae
Microsyops sp. Leidy 1872
    = Microsyopidae indet. Osborn and Wortman 1892
Alroy 2002
Niptomomys doreenae McKenna 1960
Mammalia - Primates - Paromomyidae
Phenacolemur praecox Matthew 1915
    = Phenacolemurinae indet. Simpson 1955
Alroy 2002
Phenacolemur simonsi Bown and Rose 1976
Ignacius graybullianus Bown and Rose 1976
Mammalia - Primates - Micromomyidae
Tinimomys graybulliensis Szalay 1974
Mammalia - Primates - Notharctidae
Pelycodus sp. Cope 1875
    = Cantius sp. Simons 1962
Alroy 2002
"mckennai/trigonodus"
Mammalia - Primates - Omomyidae
Tetonoides tenuiculus (Jepsen 1930)
    = Teilhardina sp. Simpson 1940
Bown and Rose 1987
T. crassidens-americana intergrade; from Y-97, 104, 207, 341, 358, 382
Tetonius homunculus (Cope 1882)
    = Tetonius matthewi Bown and Rose 1987
Bown and Rose 1987
Y-104
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 - Apatemyidae
Labidolemur kayi Simpson 1929
Gingerich 1982
"Apatemys DUPLICATE REF 1645 or 1646 or 1647 or 1648 or 1649
Mammalia - Esthonychidae
Esthonyx spatularius Cope 1880
Mammalia
Esthonyx grangeri Simpson 1937
recombined as Azygonyx grangeri
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:140 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 these localities are in Big Horn County
Metadata
Also known as:YPM 92, 93, 94, 96, 97, 97a, 104, 106, 206, 207, 341, 346, 358, 359, 382, 383, USGS 1640
Database number:15510
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]
1125 T. M. Bown and D. Schankler. 1982. A review of the Proteutheria and Insectivora of the Willwood Formation (Lower Eocene), Bighorn Basin, Wyoming. United States Geological Survey Bulletin 1523:1-79 [J. Alroy/J. Alroy/J. Ju]
1645 P. D. Gingerich. 1982. Time resolution in mammalian evolution: sampling, lineages and faunal turnover. Proceedings of the Third North American Paleontological Convention 1:205-210 [J. Alroy/J. Alroy/M. Uhen]
1666 P. D. Gingerich and H. A. Deutsch. 1989. Systematics and Evolution of Early Eocene Hyaenodontidae (Mammalia, Creodonta) in the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(13):327-391 [J. Alroy/J. Alroy/J. Marcot]
2677 M. A. O'Leary and K. D. Rose. 1995. New mesonychian dentitions from the Paleocene of the Bighorn Basin, Wyoming. Annals of Carnegie Museum 64(2):147-172 [J. Alroy/J. Alroy/P. Mannion]