FG-25: Wasatchian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Multituberculata - Eucosmodontidae
Neoliotomus ultimus (Granger and Simpson 1928)
7 specimens
original and current combination Eucosmodon ultimus
Mammalia - Leptictidae
Palaeictops bicuspis (Cope 1880)
Clyde 1997 1 specimen
Mammalia - Coryphodontidae
Coryphodon eocaenus Owen 1846
Clyde 1997 5 specimens
Mammalia - Esthonychidae
Esthonyx spatularius Cope 1880
Clyde 1997 7 specimens
Mammalia
Azygonyx sp. Gingerich 1989
Clyde 1997 1 specimen
Mammalia - Macroscelidea - Apheliscidae
Haplomylus speirianus (Cope 1880)
Clyde 1997 16 specimens
Mammalia - Phenacodontidae
Ectocion osbornianus (Cope 1882)
Clyde 1997 4 specimens
Phenacodus vortmani (Cope 1880)
Clyde 1997 3 specimens
Mammalia - Perissodactyla - Equidae
Hyracotherium grangeri Gingerich 1989
Clyde 1997 71 specimens
recombined as Sifrhippus grangeri
Mammalia - Procreodi - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915
Clyde 1997 2 specimens
Mammalia - Diacodexeidae
Diacodexis metsiacus (Cope 1882)
Clyde 1997 6 specimens
Mammalia - Acreodi - Mesonychidae
Pachyaena gracilis Matthew and Granger 1915
Clyde 1997 1 specimen
Mammalia - Acreodi
Wyolestes apheles Gingerich 1981
Gingerich 1981 2 specimens
DUPLICATE REF 1643 or 1644
Mammalia - Viverravidae
Didymictis protenus (Cope 1874)
Clyde 1997 1 specimen
Viverravus acutus Matthew and Granger 1915
Clyde 1997 1 specimen
Mammalia
Uintacyon rudis Rose 1981
Clyde 1997 1 specimen
Mammalia - Creodonta - Hyaenodontidae
Prototomus phobos Gingerich and Deutsch 1989
Gingerich and Deutsch 1989 1 specimen
Arfia shoshoniensis (Matthew and Granger 1915)
Gingerich and Deutsch 1989 2 specimens
Mammalia - Creodonta - Oxyaenidae
Clyde 1997 1 specimen
Mammalia - Rodentia - Ischyromyidae
Paramys sp. Leidy 1871
Clyde 1997 1 specimen
Paramys pycnus Ivy 1990
Ivy 1990 1 specimen
Acritoparamys atwateri (Loomis 1907)
Clyde 1997 2 specimens
Mammalia - Primates - Microsyopidae
Arctodontomys wilsoni (Szalay 1969)
Gunnell 1985 1 specimen
Mammalia - Primates - Notharctidae
Cantius ralstoni (Matthew 1915)
Clyde 1997 10 specimens
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960
Clyde 1997 14 specimens
Reptilia
Allognathosuchus sp. Mook 1921
Clyde 1997
Reptilia - Anguidae
Paraglyptosaurus sp. Sullivan 1979
Clyde 1997
Reptilia - Lacertilia
Lacertilia indet. Owen 1842
Clyde 1997
see common names

Geography
Country:United States State/province:Wyoming County:Big Horn
Coordinates: 44.6° North, 108.5° West (view map)
Paleocoordinates:49.4° North, 91.3° West
Basis of coordinate:estimated from map
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:Coon Creek Local bed:95
Local order:bottom to top
Regional section:Southeast Regional bed:1290
Regional order:bottom to top
Stratigraphic resolution:group of beds
Lithology and environment
Primary lithology: lithified "siliciclastic"
Includes fossils?Y
Environment:fluvial-lacustrine indet. Tectonic setting:intermontane basin
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Associated major elements:some
Disassociated major elements:many
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:some genera
Collection methods:surface (float),surface (in situ),survey of museum collection
Reason for describing collection:taxonomic analysis
Museum repositories:UMMP
Taxonomic list comments:Zone Wa-1
Metadata
Database number:15589
Authorizer:J. Alroy, W. Clyde Enterer:J. Alroy, L. Gannon
Modifier:G. Varnham Research group:vertebrate
Created:1993-09-27 00:00:00 Last modified:2022-02-15 07:22:24
Access level:the public Released:1993-09-27 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
2158. D. W. Krause. 1982. Multituberculates from the Wasatchian Land-Mammal Age, Early Eocene, of Western North America. Journal of Paleontology 56(2):271-294 [J. Alroy/J. Alroy/J. Ju]

Secondary references:

11717 W. C. Clyde. 1997. Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary. PhD Thesis, University of Michigan [W. Clyde/W. Clyde/J. Alroy]
1643 P. D. Gingerich. 1981. Radiation of Early Cenozoic Didymoconidae (Condylarthra, Mesonychia) in Asia, with a New Genus from the Early Eocene of Western North America. Journal of Mammalogy 62(3):526-538 [J. Alroy/J. Alroy/P. Mannion]
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]
1728 G. F. Gunnell. 1985. Systematics of Early Eocene Microsyopinae (Mammalia, Primates) in the Clark's Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(2):51-71 [J. Alroy/J. Alroy/M. Uhen]
1999 L. D. Ivy. 1990. Systematics of Late Paleocene and Early Eocene Rodentia (Mammalia) from the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 28(2):21-70 [J. Alroy/J. Alroy/P. Mannion]