Washakie B (Lower): Uintan, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Dinocerata - Uintatheriidae
Mammalia - Hyaenodonta
Denison 1938
Mammalia - Helohyidae
see Gazin 1955
see Gazin 1955
Mammalia - Homacodontidae
Mammalia - Camelidae
assignment questioned by Walsh pers. comm.
Mammalia - Oromerycidae
Mammalia - Perissodactyla - Brontotheriidae
Mihlbachler 2008
Dolichorhinus sp. Hatcher 1895
listed as "D. hyognathus" by Roehler 1973
    = Dolichorhinus hyognathus n. sp. Osborn 1889
Mihlbachler 2008
YPM PU10273
presumably "M. earlei" type of Osborn 1908 from "North side of Haystack Mountain... Washakie B" (also listed by Roehler 1973); includes large bone bed sample from bed 643
Mammalia - Perissodactyla - Chalicotheriidae
includes type, see Radinsky 1964
Mammalia - Perissodactyla
Forstercooperia minuta Lucas et al. 1981
Alroy 2002
could be Uintaceras according to Holbrook and Lucas 1997
Mammalia - Perissodactyla - Hyracodontidae
Cope 1880
is probably from this level see Radinsky 1967a; also at bed 630: McCarroll et al. 1996a (1 measurement)
as well as type of "Eotrigonias petersoni": see Radinsky 1967a (8 measurements)
Mammalia - Perissodactyla - Amynodontidae
"approximately bed 630"; presumably includes type of "Orthocynodon antiquus"; see Wilson and Schiebout 1981 (1 measurement)
Mammalia - Perissodactyla - Rhinocerotidae
Holbrook and Lucas 1997
UCMP V-78102, V-5426, implicitly at this level; "Forstercooperia grandis"
Mammalia - Perissodactyla - Hyrachyidae
Mammalia - Perissodactyla - Tapiridae
if this includes the type, then the type of Chasmotherium intermedius may also be from this horizon: see Radinsky 1963; new material is from "approximately bed 630": McCarroll et al. 1996a
Mammalia - Acreodi - Mesonychidae
Mammalia - Primates - Notharctidae
Mammalia - Rodentia - Protoptychidae
includes type of "P. smithi" of Wilson 1937c; see Turnbull 1991
Mammalia - Rodentia - Ischyromyidae
listed by Black and Sutton 1984 as "L. leptos" - surely a lapsus; "L. grangeri" also listed despite synonymy of Wood 1962
Mammalia - Condylarthra - Hyopsodontidae
Hyopsodus sp. Leidy 1870
listed as "H. cf. paulus" by Turnbull
see common names

Geography
Country:United States State/province:Wyoming County:Sweetwater
Coordinates: 41.7° North, 109.0° West (view map)
Paleocoordinates:48.7° North, 88.5° West (Wright 2013)
Basis of coordinate:based on political unit
Time
Period: Paleogene Epoch: Eocene
10 m.y. bin: Cenozoic 2-3
*Period:Tertiary
Key time interval: Uintan
Age range of interval: 46.2 - 39.7 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Washakie Member:Adobe Town, middle unit
Local section:Washa Local bed:7
Local order:bottom to top
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:this unit spans beds 620 to 675 of Roehler; most of the fauna appears to be from the lower half, which is entirely in a normal polarity interval
replaces list of Turnbull 1972
Metadata
Database number:16648
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:M. Carrano Research group:vertebrate
Created:1994-07-26 00:00:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:1994-07-26 00:00:00
Creative Commons license:CC0
Reference information

Primary reference:
2495. S. M. McCarroll, J. J. Flynn, and W. D. Turnbull. 1996. Biostratigraphy and magnetostratigraphy of the Bridgerian-Uintan Washakie Formation, Washakie Basin, Wyoming. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 25-39 [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]
53308 E. D. Cope. 1880. A new genus of tapiroids. The American Naturalist 14:382-383 [M. Carrano/M. Carrano/M. Carrano]
13615% 37020R. H. Denison. 1938. The broad-skulled Pseudocreodi. Annals of the New York Academy of Sciences 37:163-256 [J. Alroy/J. Alroy/W. Clyde]
1927 L. T. Holbrook and S. G. Lucas. 1997. A New Genus of Rhinocerotoid from the Eocene of Utah and the Status of North American "Forstercooperia". Journal of Vertebrate Paleontology 17(2):384-396 [J. Alroy/J. Alroy/J. Ju]
45360 M. C. Mihlbachler. 2008. Species taxonomy, phylogeny, and biogeography of the Brontotheriidae (Mammalia: Perissodactyla). Bulletin of the American Museum of Natural History 311(1):1-475 [P. Wagner/P. Wagner]