Little Muddy V (UM BB-13): Bridgerian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus minusculus Leidy 1873
omitted by Gunnell 1998c
Mammalia - Perissodactyla - Equidae
Orohippus cf. pumilus (Marsh 1871)
Mammalia - Perissodactyla - Tapiridae
Rhinocerotoidea indet. Gray 1821
Zonneveld et al. 2000
said to be a new genus
    = cf. Dilophodon destitutus n. sp. Zonneveld and Gunnell 2003
Zonneveld and Gunnell 2003
Mammalia - Rodentia - Sciuravidae
Sciuravus nitidus Marsh 1871
omitted by Gunnell 1998c
Mammalia - Rodentia - Ischyromyidae
Leptotomus parvus Wood 1959
omitted by Gunnell 1998c
Paramys cf. copei Loomis 1907
omitted by Gunnell 1998c
Mammalia - Primates - Microsyopidae
Microsyops cf. elegans (Marsh 1871)
Reptilia - Iguanidae
Parasauromalus olseni Gilmore 1928
Zonneveld et al. 2000 2 specimens
UM 98657, partial right dentary; 98658, partial right dentary
Reptilia - Anguidae
Xestops cf. vagans (Marsh 1872)
Zonneveld et al. 2000
original and current combination Oreosaurus vagans
Reptilia - Baenidae
Baena arenosa Leidy 1870
Zonneveld et al. 2000
Reptilia - Testudines - Geoemydidae
Echmatemys septaria (Cope 1873)
Zonneveld et al. 2000
synonym of Echmatemys stevensoniana
Reptilia - Crocodylidae
Crocodylidae indet. Cuvier 1807
Zonneveld et al. 2000
said to be a new genus
unclassified
Baptemys cf. wyomingensis (Leidy 1870)
Zonneveld et al. 2000
original and current combination Emys wyomingensis
see common names

Geography
Country:United States State/province:Wyoming County:Lincoln
Coordinates: 41.8° North, 110.7° West (view map)
Paleocoordinates:45.9° North, 96.9° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Eocene
10 m.y. bin:Cenozoic 2
*Period:Tertiary
Key time interval:Bridgerian
Age range of interval:50.50000 - 46.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Wasatch
Local section:WGRB Local bed:9
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: fossils come from throughout a 30 m section that alternates between the Upper Member of the Wasatch and the Laney Member of the Green River: Zonneveld and Gunnell 2003
Lithology and environment
Primary lithology:red silty mudstone
Secondary lithology:planar lamination,bioturbation "shale"
Lithology description: "Red to maroon silty mudstone... Paleosol" and "Laminated to bioturbated shale (lacustrine)": Zonneveld and Gunnell 2003
Environment:fluvial-lacustrine indet.
Geology comments: both floodplain and lacustrine environments are sampled
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:NISP unclear because taxa are omitted by Gunnell 1998c
see map of Zonneveld et al. 2000, who repeat the list
Metadata
Also known as:UM BB013; Desertion Point
Database number:16262
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:2002-05-15 00:00:00 Last modified:2003-09-29 20:18:52
Access level:the public Released:2002-05-15 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1248. W. C. Clyde, J.-P. Zonneveld, J. Stamatakos, G. F. Gunnell, and W. S. Bartels. 1997. Magnetostratigraphy across the Wasatchian-Bridgerian boundary (early to middle Eocene) in the western Green River Basin, Wyoming. Journal of Geology 105:657-669 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

3806 J.-P. Zonneveld, G. F. Gunnell, and W. S. Bartels. 2000. Early Eocene fossil vertebrates from the southwestern Green River Basin, Lincoln and Uinta counties, Wyoming. Journal of Vertebrate Paleontology 20(2):369-386 [J. Alroy/J. Alroy/J. Alroy]
9287 J.-P. Zonneveld and G. F. Gunnell. 2003. A new species of cf. Dilophodon (Mammalia; Perissodactyla) from the early Bridgerian of southwestern Wyoming. Journal of Vertebrate Paleontology 23(3):652-658 [J. Alroy/J. Alroy/J. Alroy]