Lone Tree (Bridger D): Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Leptictidae
Hypictops syntaphus n. sp. Gazin 1949
    = Leptictidae indet. Gill 1872
Alroy 2002
from just above Lone Tree White Layer, Bridger D2, 3 mi N of Lone Tree; see Gazin 1949
Mammalia - Perissodactyla - Brontotheriidae
Palaeosyops robustus (Marsh 1872)
Osborn 1929
Bridger D4; also Gazin 1949: 3 mi N of Lone Tree; associated with type of "Hypictops syntaphus"; includes type of "P. copei" of Osborn 1908 from Bridger D3, and referred specimen from D1, both at Lone Tree
Limnohyops laticeps (Leidy 1872)
    = Palaeosyops laticeps Leidy 1872
Osborn 1929
synonym of Palaeosyops robustus
Bridger D2
Mammalia - Perissodactyla
Helaletes intermedius (Osborn et al. 1878)
    = Desmatotherium intermedius Osborn et al. 1878
Schoch 1984
recombined as Helaletes intermedius
referred specimen of "Ephyrachyus implicatus" of Wood 1934, from Bridger D1
Isectolophus latidens (Osborn et al. 1878)
Holbrook et al. 2004
AMNH skulls from "Bridger 'D4', Henry's Fork, Lone Tree"
Mammalia - Metacheiromyidae
Metacheiromys osborni n. sp. Simpson 1931
    = Metacheiromys dasypus Osborn 1904
Alroy 2002
from Bridger D2: see Simpson 1931, Schoch 1984a
Reptilia
Pristichampsus vorax (Troxell 1925)
Langston 1975
recombined as Boverisuchus vorax
USNM 12957
see common names

Geography
Country:United States State/province:Wyoming County:Uinta
Coordinates: 41.2° North, 110.5° West (view map)
Paleocoordinates:45.2° North, 96.8° 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
Local section:Bridg Local bed:6
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Metadata
Database number:16279
Authorizer:J. Alroy, P. Mannion Enterer:J. Alroy, P. Mannion
Research group:vertebrate
Created:1996-08-05 00:00:00 Last modified:2002-06-03 03:27:41
Access level:the public Released:1996-08-05 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

1623. C. L. Gazin. 1976. Mammalian Faunal Zones of the Bridger Middle Eocene. Smithsonian Contributions to Paleobiology 26:1-25 [J. Alroy/J. Alroy/J. Marcot]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
40434 L. T. Holbrook, S. G. Lucas, and R. J. Emry. 2004. Skulls of the Eocene perissodactyls (Mammalia) "Homogalax" and "Isectolophus". Journal of Vertebrate Paleontology 24(4):951-956 [J. Alroy/J. Alroy]
46624 W. Langston. 1975. Ziphodont crocodiles: Pristichampsus vorax (Troxell), new combination. Fieldiana: Geology 33(16):291-314 [P. Mannion/P. Mannion/M. Carrano]
2708 H. F. Osborn. 1929. New Eurasiatic and American proboscideans. American Museum Novitates 393:1-22 [J. Alroy/J. Alroy/M. Carrano]
3050 R. M. Schoch. 1984. Two unusual specimens of Helaletes in the Yale Peabody Museum collections, and some comments on the ancestry of the Tapiridae (Perissodactyla, Mammalia). Postilla 193:1-20 [J. Alroy/J. Alroy/J. Ju]