PBDB Collection

Washakie A: Bridgerian, Wyoming

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia

	Peratherium knighti McGrew et al. 1959	McCarroll et al. 1996
	= Herpetotherium cf. knighti McGrew et al. 1959	Alroy 2002
Mammalia - Apatemyidae

	cf. Apatemys bellus Marsh 1872	McCarroll et al. 1996
Mammalia - Condylarthra - Hyopsodontidae

	Hyopsodus paulus Leidy 1870	McCarroll et al. 1996
Mammalia - Primates - Microsyopidae

	Microsyops annectens (Marsh 1872)	McCarroll et al. 1996
Mammalia - Primates - Omomyidae

	Hemiacodon gracilis Marsh 1872	McCarroll et al. 1996

	Omomys carteri Leidy 1869	McCarroll et al. 1996
Mammalia - Primates - Notharctidae

	Notharctus robustior Leidy 1872	McCarroll et al. 1996
Mammalia - Rodentia - Sciuravidae

	Sciuravus sp. Marsh 1871	McCarroll et al. 1996

	Sciuravus nitidus Marsh 1871	McCarroll et al. 1996
Mammalia - Rodentia - Muridae

	Mysops parvus (Marsh 1872)	McCarroll et al. 1996
Mammalia - Rodentia - Ischyromyidae

	Paramys sp. Leidy 1871	McCarroll et al. 1996
	listed as "P. delicatus" by Turnbull

	Leptotomus bridgerensis Wood 1962	McCarroll et al. 1996
	= Leptotomus parvus Wood 1959	Alroy 2002

	Thisbemys sp. Wood 1959	McCarroll et al. 1996
Mammalia - Perissodactyla - Hyrachyidae

	Hyrachyus modestus (Leidy 1870)	McCarroll et al. 1996

	Hyrachyus eximius Leidy 1871	McCarroll et al. 1996
Mammalia - Perissodactyla

	Isectolophus latidens (Osborn et al. 1878)	McCarroll et al. 1996
	(3 measurements)
Mammalia - Perissodactyla - Brontotheriidae

	Palaeosyops sp. Leidy 1870	McCarroll et al. 1996
	this is the AMNH "P. copei" specimen of Osborn 1929 from Washakie A; may include "Titanotheriidae indet." of Turnbull 1972

	Mesatirhinus sp. Osborn 1908	McCarroll et al. 1996
	listed as "M. megarhinus" by Turnbull

	Telmatherium sp. Marsh 1872	McCarroll et al. 1996
	based on discussion of Mader 1989, I believe this includes the type of "Manteoceras washakiensis" Osborn 1908 from "Base of Haystack Mountain... summit of the Lower Washakie (A)" (said by Roehler 1973 to be upper Washakie A
Mammalia - Perissodactyla - Equidae

	Orohippus sp. Marsh 1872	McCarroll et al. 1996
Mammalia - Homacodontidae

	Homacodon vagans Marsh 1872	McCarroll et al. 1996
Mammalia - Viverravidae

	Viverravus sp. Marsh 1872	McCarroll et al. 1996
Mammalia

	Miacis medius Matthew 1909	McCarroll et al. 1996

	Miacis washakius (Wortman 1901)	McCarroll et al. 1996

	Miacis cf. sylvestris (Marsh 1872)	McCarroll et al. 1996
Mammalia - Creodonta - Oxyaenidae

	Patriofelis ferox (Marsh 1872)	Denison 1938
Mammalia - Creodonta - Hyaenodontidae

	Sinopa sp. Leidy 1871	McCarroll et al. 1996
	listed as "S. rapax" by Turnbull
Mammalia - Acreodi - Mesonychidae

	Harpagolestes sp. Wortman 1901	McCarroll et al. 1996
	probably "Synoplotherium sp." of Turnbull 1972
Mammalia - Pantolestidae

	Pantolestes cf. elegans (Marsh 1872)	McCarroll et al. 1996
	= Pantolestidae indet. Cope 1884	Alroy 2002

	Pantolestes cf. longicaudus (Cope 1872)	McCarroll et al. 1996

	Pantolestes cf. natans Matthew 1909	McCarroll et al. 1996
Mammalia

	Stylinodon mirus Marsh 1874	McCarroll et al. 1996

	Stylinodon inexplicatus n. sp. Schoch and Lucas 1981	McCarroll et al. 1996
	and only specimen according to Schoch and Lucas 1981b
Mammalia - Dinocerata - Uintatheriidae

	Uintatherium anceps (Marsh 1871)	McCarroll et al. 1996
	listed as "Dinoceras cuneum" and "Tinoceras affine" by Turnbull 1972
Reptilia - Baenidae

	Baena arenosa Leidy 1870	Hay 1908	1 specimen
	AMNH 1115 (Hay, 1908, figs. 49-5 1), shell, portion of pelvis.
see common names

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

Period:	Paleogene	Epoch:	Eocene
10 m.y. bin:	Cenozoic 2
*Period:	Tertiary
Key time interval:	Bridgerian	Mammal zone:	Br3
Age range of interval:	50.5 - 46.2 m.y. ago
* legacy (obsolete) database fields

Formation:	Washakie
Local order:	bottom to top
Stratigraphy comments: McCarroll et al. 1996 correlate older collections listed as "Washakie A" with both the Kinney Rim and lowest unit of the Adobe Town Member. Both members are considered late Bridgerian (Br3) in age.

Primary lithology:	not reported
Environment:	terrestrial indet.

Modes of preservation:	body
Size of fossils:	macrofossils

Collection excludes:	some genera
Reason for describing collection:	general faunal/floral analysis
Taxonomic list comments:this unit spans beds 569 to 620 of Roehler; most of this interval is reversed, but there are two normal excursions of unclear significance; it is best treated as a reversed chron immediately preceding the normal chron seen in the overlying unit Turnbull 1972 distinguished "upper" and "lower" Washakie A faunas but the upper fauna is duplicated almost entirely by the lower fauna and the two are merged by McCarroll et al.; list is still incomplete and certain older i.d.s therefore may be valid

Also known as:	LaClede Meadows
Database number:	16647
Authorizer:	J. Alroy, R. Benson	Enterer:	J. Alroy, R. Benson
Modifier:	P. Holroyd	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

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1361	5% 37020	R. H. Denison. 1938. The broad-skulled Pseudocreodi. Annals of the New York Academy of Sciences 37:163-256 [J. Alroy/J. Alroy/W. Clyde]
704		E. S. Gaffney. 1972. The systematics of the North American family Baenidae (Reptilia, Cryptodira). Bulletin of the American Museum of Natural History 147(5):245-312 [J. Alroy/M. Sommers/R. Benson]
14442	ETE	O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568 [M. Carrano/M. Carrano/M. Carrano]
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]