PBDB Collection

Little Muddy II (UM BB-110): Wasatchian - Bridgerian, Wyoming

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia - Rodentia - Sciuravidae

	Sciuravus nitidus Marsh 1871

	Knightomys depressus (Loomis 1907)
Mammalia - Primates - Paromomyidae

	Phenacolemur jepseni Simpson 1955
	= Simpsonlemur cf. jepseni Simpson 1955	Alroy 2002
Mammalia - Primates - Omomyidae

	Anemorhysis cf. wortmani Bown and Rose 1984
	(1 measurement)
Mammalia - Primates - Notharctidae

	Notharctus nunienus (Cope 1881)
	= Cantius nunienus Cope 1881	Zonneveld et al. 2000
	"C. frugivorus"
Mammalia - Pantolestidae

	Palaeosinopa cf. lutreola Matthew 1918
Mammalia - Phenacodontidae

	Meniscotherium chamense Cope 1874
Mammalia - Perissodactyla - Palaeotheriidae

	Hyracotherium vasacciense (Cope 1872)
Mammalia - Diacodexeidae

	Diacodexis secans (Cope 1881)
Mammalia - Creodonta - Hyaenodontidae

	Hyaenodontidae indet. Leidy 1869	Zonneveld et al. 2000
Mammalia - Metacheiromyidae

	Palaeanodon sp. Matthew 1918
Mammalia

	Vulpavus profectus Matthew 1909
	= Vulpavus canavus Cope 1881	Zonneveld et al. 2000
	probably also "Miacis latidens"
Mammalia - Viverravidae

	Viverravus minutus Wortman 1901
Mammalia - Condylarthra - Hyopsodontidae

	Hyopsodus wortmani Osborn 1902
Mammalia - Leptictidae

	Palaeictops bicuspis (Cope 1880)
Mammalia

	Peratherium marsupium (Troxell 1923)
	(1 measurement)
	= Herpetotherium marsupium Troxell 1923	Alroy 2002
Reptilia

	cf. Crocodylus affinis Marsh 1871	Zonneveld et al. 2000

	Amphisbaenia indet. Gray 1844	Zonneveld et al. 2000	1 specimen
	UM 101168, fused atlas and axis
Reptilia - Anguidae

	Xestops cf. vagans (Marsh 1872)	Zonneveld et al. 2000
see common names

Geography

Country:	United States	State/province:	Wyoming	County:	Lincoln
Coordinates:	41.8° North, 110.7° West (view map)
Paleocoordinates:	49.7° North, 85.5° West (Wright 2013)
Basis of coordinate:	based on political unit
Geographic resolution:	small collection

Time

Period:	Paleogene	Epoch:	Eocene
Stage:	Ypresian	10 m.y. bin:	Cenozoic 2
*Period:	Tertiary
Key time interval:	Wasatchian - Bridgerian
Age range of interval:	54.9 - 46.2 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Wasatch
Local section:	WGRB	Local bed:	2
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:	taxonomic analysis
Taxonomic list comments:see map of Zonneveld et al. 2000, who repeat the list "Hyopsodus miticulus" is omitted by Zonneveld et al. 2000

Metadata

Database number:	15669
Authorizer:	J. Alroy	Enterer:	J. Alroy
Modifier:	G. Varnham	Research group:	vertebrate
Created:	2002-05-15 00:00:00	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	2002-05-15 00:00:00
Creative Commons license:	CC0

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:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
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]