South Pass (Gardnerbuttean): Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Rodentia - Sciuravidae
Sciuravidae indet. Miller and Gidley 1918
Mammalia - Rodentia - Cylindrodontidae
Cylindrodontidae indet. Miller and Gidley 1918
Mammalia - Rodentia - Paramyidae
Paramyidae indet. Miller and Gidley 1918
"3-4 species"
Mammalia - Rodentia - Ischyromyidae
Mammalia - Primates - Microsyopidae
Mammalia - Primates - Plesiadapidae
Muldoon and Gunnell 2002
UM SP-23
Mammalia - Primates - Omomyidae
Muldoon and Gunnell 2002
at SP-8, 23, 40, 46, 64, 122: Muldoon and Gunnell 2002
Absarokius nocerai Robinson 1966
    = Artimonius nocerai Robinson 1966
Muldoon and Gunnell 2002
at SP-9, 26, 70: Muldoon and Gunnell 2002
Uintanius rutherfurdi (Robinson 1966)
UM SP-28: Muldoon and Gunnell 2002
at UM SP-1, 23, 28, 35, 79, 122: Muldoon and Gunnell 2002
at UM SP-6, 23, 26, 28, 37, 79, 110, 127: Muldoon and Gunnell 2002 (1 measurement)
said to be new
Muldoon and Gunnell 2002
SP-23
UM SP-46, 79, 110, 122: Muldoon and Gunnell 2002
UM SP-23: Muldoon and Gunnell 2002
Mammalia - Primates - Notharctidae
said to be new (1 measurement)
Gunnell 2002
type from UM SP-24; also at SP-6, SP-24, SP-36, SP-37, SP-38, SP-67, SP-77, SP-79, SP-83, SP-117
Mammalia - Pantolestidae
Mammalia - Perissodactyla - Brontotheriidae
(5 measurements)
Mammalia - Perissodactyla - Palaeotheriidae
Mammalia - Perissodactyla - Equidae
Mammalia - Perissodactyla - Hyrachyidae
Mammalia - Perissodactyla
Mammalia - Perissodactyla - Isectolophidae
Mammalia - Homacodontidae
said to be new
said to be new
"small"
Mammalia - Diacodexeidae
Mammalia - Acreodi - Mesonychidae
Mammalia - Creodonta - Hyaenodontidae
Sinopa sp. Leidy 1871
Tritemnodon sp. Matthew 1906
Mammalia - Creodonta
Mammalia - Creodonta - Oxyaenidae
Patriofelis sp. Leidy 1870
Mammalia - Metacheiromyidae
Mammalia - Epoicotheriidae
Mammalia
Mammalia - Viverravidae
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870
Mammalia - Stylinodontidae
Mammalia - Esthonychidae
Esthonyx sp. Cope 1874
Trogosus sp. Leidy 1871
Mammalia - Apatemyidae
Mammalia - Leptictidae
Mammalia
Peratherium sp. Aymard 1850
    = Herpetotheriinae indet. Trouessart 1879
Alroy 2002
Mammalia - Dinocerata - Uintatheriidae
Reptilia - Baenidae
Baenidae indet. Cope 1882
Reptilia - Testudines - Emydidae
Emydidae indet. Rafinesque 1815
said to be new
Reptilia - Testudines - Geoemydidae
Reptilia - Testudines
Reptilia - Testudines - Trionychidae
said to be new
    = Trionychinae indet. Gray 1825
Alroy 2007
Reptilia
Pristichampsus vorax (Troxell 1925)
Reptilia - Tropidophiidae
boid snake
Reptilia - Boidae
boid snake
Reptilia
boid snake
boid snake
Reptilia - Agamidae
Tinosaurus sp. (Estes 1783)
agamid lizard
Reptilia - Iguanidae
iguanid lizard
Reptilia - Amphisbaenidae
Reptilia - Xantusiidae
xantusiid lizard
Reptilia
xenosaurid lizard
Reptilia - Anguidae
"large"
anguid lizard
anguid lizard
Reptilia
varanid lizard
unclassified
see common names

Geography
Country:United States State/province:Wyoming County:Fremont
Coordinates: 42.4° North, 108.9° West (view map)
Paleocoordinates:49.7° North, 85.2° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:local area
Time
Period: Paleogene Epoch: Eocene
10 m.y. bin: Cenozoic 2
*Period:Early/Lower Tertiary *Epoch:Middle Eocene
*Local age/stage:Early/Lower Bridgerian
Key time interval: Bridgerian
Age range of interval: 50.5 - 46.2 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Wasatch
Local section:South Pass Local bed:3
Local order:bottom to top
Stratigraphic resolution:member
Stratigraphy comments: spans upper chron C24n and lower chron C23r: Clyde et al. 2001
Lithology and environment
Primary lithology:brown "shale"
Secondary lithology:gypsiferous "carbonate"
Lithology description: ""thick brown paper shales interbedded with relatively pure carbonate, trona, and gypsum beds"
Environment:fluvial-lacustrine indet.
Geology comments: fossils are from "channel lags, sheet wash concentrations, and along ancient lake 'strand lines'"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Also known as:Honeycomb Buttes
Database number:15837
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:1998-09-21 00:00:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:1998-09-21 00:00:00
Creative Commons license:CC0
Reference information

Primary reference:
7542. G. F. Gunnell and W. S. Bartels. 2001. Basin margins, biodiversity, evolutionary innovation, and the origin of new taxa. Eocene biodiversity: unusual occurrences and rarely sampled habitats (G. F. Gunnell, ed.) 403-432 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

19636 J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy]
1740 G. F. Gunnell and W. S. Bartels. 1997. Basin-margin mammalian assemblages from the Wasatch Formation (Bridgerian) of the northeastern Green River Basin, Wyoming; anachronistic taxa and the origin of new genera. Journal of Vertebrate Paleontology 17(3):51-51 [J. Alroy/J. Alroy]