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

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