PBDB Collection

Nern-Baker: Lancian, Wyoming
collected by W. A. Clemens

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Chondrichthyes - Hybodontiformes - Lonchidiidae

	Lonchidion selachos Estes 1964	Database 2005	1 element
Chondrichthyes - Rajiformes - Rhinobatidae

	Myledaphus bipartitus Cope 1876	Estes 1964	1 element
Osteichthyes

	Osteichthyes indet. Huxley 1880	Database 2005	1 element
Actinopteri - Amiiformes - Amiidae

	Amiidae indet. Huxley 1861	Database 2005	1 element

	Amia uintaensis (Leidy 1873)	Database 2005	1 element
	nomen dubium belonging to Amiinae
Actinopteri - Lepisosteiformes - Lepisosteidae

	Lepisosteus sp. Agassiz 1843	Database 2005	1 element
Amphibia

	Amphibia indet. Linnaeus 1758	Database 2005	1 specimen
Amphibia - Temnospondyli - Urodela

	Urodela indet. (Duméril 1805)	Database 2005	1 specimen
Amphibia - Temnospondyli - Batrachosauroididae

	Prodesmodon copei Estes 1964	Database 2005	1 specimen
Reptilia

	Reptilia indet. Laurenti 1768	Database 2005	1 specimen
Reptilia - Chamopsiidae

	Chamops segnis Marsh 1892	Database 2005	1 specimen
Reptilia - Archosauria

	Archosauria indet. Cope 1869	Database 2005	4 specimens
Reptilia - Crocodylidae

	Crocodylidae indet. Cuvier 1807	Database 2005	1 specimen
Reptilia - Testudines

	? Cryptodira indet. Cope 1868	Database 2005	1 specimen
Mammalia - Creodonta

	Cimolestes magnus Clemens and Russell 1965	Clemens 1973
	recombined as Altacreodus magnus
Mammalia - Cimolestidae

	Cimolestes stirtoni Clemens 1973	Clemens 1973

	Cimolestes incisus Marsh 1889	Clemens 1973
Mammalia - Gypsonictopidae

	Gypsonictops hypoconus Simpson 1927	Clemens 1973
Mammalia - Alphadontidae

	Alphadon marshi Simpson 1927	Clemens 1966
Mammalia - Pediomyidae

	Pediomys hatcheri (Osborn 1898)	Clemens 1966
	original and current combination Protolambda hatcheri

	Pediomys cooki Clemens 1966	Clemens 1966
	recombined as Leptalestes cooki

	Pediomys elegans Marsh 1889	Clemens 1966
Mammalia

	Nortedelphys magnus Case et al. 2004	Case et al. 2004
Mammalia - Stagodontidae

	Didelphodon vorax Marsh 1889	Clemens 1966
Mammalia - Multituberculata - Cimolomyidae

	Meniscoessus robustus (Marsh 1889)
Mammalia - Multituberculata - Cimolodontidae

	Cimolodon nitidus Marsh 1889
Mammalia - Multituberculata - Neoplagiaulacidae

	Mesodma formosa (Marsh 1889)
	= Mesodma sp. Jepsen 1940	Alroy 2002

	Mesodma thompsoni Clemens 1964
see common names

Geography

Country:	United States	State/province:	Wyoming	County:	Niobrara
Coordinates:	43.8° North, 104.6° West (view map)
Paleocoordinates:	50.3° North, 79.2° West
Basis of coordinate:	based on political unit
Geographic resolution:	small collection

Time

Period:	Cretaceous	Epoch:	Late/Upper Cretaceous
Stage:	Maastrichtian	10 m.y. bin:	Cretaceous 8
*Epoch:	Senonian
Key time interval:	Lancian
Age range of interval:	72.10000 - 66.00000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Lance
Stratigraphic resolution:	bed

Lithology and environment

Primary lithology:	"cross stratification" sandstone
Includes fossils?	Y
Lithology description: "a cross-stratified sandstone"
Environment:	terrestrial indet.

Taphonomy

Modes of preservation:	body
Lagerst�tten type:	concentrate
Degree of concentration:	concentrated
Size of fossils:	mesofossils
Disassociated major elements:	many
Disassociated minor elements:	many

Collection methods and comments

Collection methods:	anthill,field collection
Reason for describing collection:	taxonomic analysis
Museum repositories:	UCMP
Collectors:	W. A. Clemens

Metadata

Also known as:	UCMP V-5619
Database number:	14598
Authorizer:	J. Alroy, M. Carrano	Enterer:	J. Alroy, M. Carrano
Modifier:	M. Carrano	Research group:	vertebrate
Created:	1994-07-26 00:00:00	Last modified:	2013-09-17 17:20:06
Access level:	the public	Released:	1994-07-26 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

1239.

W. A. Clemens. 1964. Fossil mammals of the type Lance Formation, Wyoming. Part I. Introduction and Marsupialia. University of California Publications in Geological Sciences 48:1-105 [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]
31410		J. A. Case, F. J. Goin, and M. O. Woodburne. 2004. "South American" marsupials from the Late Cretaceous of North America and the origin of marsupial cohorts. Journal of Mammalian Evolution 11(3/4):223-255 [J. Alroy/J. Alroy/J. Alroy]
1241		W. A. Clemens. 1966. Fossil mammals from the type Lance Formation, Wyoming. Part II. Marsupialia. University of California Publications in Geological Sciences 62:1-122 [J. Alroy/J. Alroy/J. Alroy]
1242		W. A. Clemens. 1973. Fossil mammals of the type Lance Formation, Wyoming. Part III. Eutheria and summary. University of California Publications in Geological Sciences 94:1-102 [J. Alroy/J. Alroy/J. Alroy]
13103		U.C.M.P. Database. 2005. UCMP collections database. University of California Museum of Paleontology [M. Carrano/M. Carrano/M. Carrano]
803		R. Estes. 1964. Fossil vertebrates from the Late Cretaceous Lance Formation, eastern Wyoming. University of California Publications in Geological Sciences 49:1-187 [J. Alroy/M. Sommers/M. Carrano]