Phil Mass Ranch: Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Apatemyidae
Apatemys bellus Marsh 1872
West 1973
    = Apatemys sp. Marsh 1872
Alroy 2002
Twin Buttes Mbr.
Mammalia - Perissodactyla - Hyrachyidae
Hyrachyus affinis (Marsh 1871)
Wood 1934
synonym of Hyrachyus modestus
"P. M. Ranch, H. F. (presumably Henry's Fork, and hence C or D)"; I believe "H. F." is a reference to Henry's Fork Table, i.e., Cedar Mountain
Mammalia - Homacodontidae
Homacodon vagans Marsh 1872
West 1984
Mammalia - Geolabididae
Centetodon pulcher Marsh 1872
Lillegraven et al. 1981
Mammalia - Rodentia - Ischyromyidae
Thisbemys corrugatus Wood 1959
Wood 1962
"presumably" Twin Buttes Mbr.
unclassified
Scenopagus edenensis (McGrew et al. 1959)
upper Bridger
see common names

Geography
Country:United States State/province:Wyoming County:Sweetwater
Coordinates: 41.7° North, 109.0° West (view map)
Paleocoordinates:45.6° North, 95.1° West
Basis of coordinate:based on political unit
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2
*Period:Tertiary
Key time interval:Bridgerian
Age range of interval:50.30000 - 46.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Bridger Member:upper
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection excludes:some genera
Taxonomic list comments:shown in map of Wheeler 1961 to be NE of Cedar Mountain and W of Twin Buttes and clearly in the Twin Buttes Mbr. based on map of West 1976a
none of the references place this definitively in C or D
Metadata
Also known as:Ringdahl Ranch
Database number:16283
Authorizer:J. Alroy Enterer:J. Alroy
Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2002-06-03 03:27:41
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

2170. L. Krishtalka. 1976. Early Tertiary Adapisoricidae and Erinaceidae (Mammalia, Insectivora) of North America. Bulletin of Carnegie Museum of Natural History 1 [J. Alroy/J. Alroy/J. Ju]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
2241 J. A. Lillegraven, M. C. McKenna, and L. Kristalka. 1981. Evolutionary relationships of middle Eocene and younger species of Centetodon (Mammalia, Insectivora, Geolabididae) with a description of the dentition of Ankylodon (Adapisoricidae). University of Wyoming Publication 45:1-115 [J. Alroy/J. Alroy/M. Uhen]
3597 R. M. West. 1973. Review of the North American Eocene and Oligocene Apatemyidae (Mammalia, Insectivora). Special Publications, Texas Tech University Museum 3 [J. Alroy/J. Alroy]
3606 R. M. West. 1984. Paleontology and Geology of the Bridger Formation, Southern Green River Basin, Southwestern Wyoming. Part 7. Survey of Bridgerian Artiodactyla, including description of a skull and partial skeleton of Antiacodon pygmaeus. Milwaukee Public Museum Contributions in Biology and Geology 56:1-47 [J. Alroy/J. Alroy/J. Marcot]
3731 A. E. Wood. 1962. The Early Tertiary Rodents of the Family Paramyidae. Transactions of the American Philosophical Society 52(1):3-261 [J. Alroy/J. Alroy/J. Marcot]
3744 H. E. Wood. 1934. Revision of the Hyrachyidae. Bulletin of the American Museum of Natural History 67(5):181-295 [J. Alroy/J. Alroy/J. Marcot]