PBDB Collection

Bear Creek: Clarkforkian, Montana

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia

	cf. Peradectes sp. Matthew and Granger 1921	Rose 1981

	Lampadophorus lobdelli n. sp. (Simpson 1929)
	= Ectoganus lobdelli Simpson 1929	Alroy 2002
Mammalia - Apatemyidae

	Apatemys kayi n. sp. (Simpson 1929)
	= Labidolemur kayi n. gen., n. sp. Simpson 1929	Alroy 2002
	CM 11703 - holotype (left dentary with p4–m3)
Mammalia - Pentacodontidae

	? Aphronorus sp. Simpson 1935	Rose 1981
Mammalia - Macroscelidea - Apheliscidae

	Haplaletes sp. Simpson 1935
	= cf. Phenacodaptes sabulosus Jepsen 1930	Rose 1981

	Haplomylus sp. Matthew 1915
	(1 measurement)
	= Haplomylus palustris n. sp. Gingerich 1994	Gingerich 1994
	replaces ID of Korth 1984; "H. cf. simpsoni" of Rose 1981a
Mammalia - Acreodi - Mesonychidae

	Dissacus cf. navajovius (Cope 1881)
	= Dissacus sp. Cope 1881	Rose 1981
Mammalia - Phenacodontidae

	Phenacodus cf. primaevus (Cope 1873)
	= Phenacodus intermedius Granger 1915	Thewissen 1990
Mammalia - Procreodi - Arctocyonidae

	Thryptacodon pseudarctos n. sp. Simpson 1928	Rose 1981
	includes "T. antiquus"
Mammalia - Viverravidae

	Hyaenodontidae indet. Leidy 1869
	= ? Viverravus sp. Marsh 1872	Rose 1981
Mammalia - Nyctitheriidae

	Protentomodon ursirivalis n. sp. Simpson 1928
Mammalia

	Entomolestes siegfriedti n. sp. (Simpson 1928)
	= Leipsanolestes siegfriedti Simpson 1928	Alroy 2002
Mammalia - Pantolestidae

	Palaeosinopa cf. didelphoides (Cope 1881)
	= cf. Palaeosinopa sp. Matthew 1901	Rose 1981
Mammalia - Rodentia - Ischyromyidae

	Paramys atavus n. sp. Jepsen 1937
	recombined as Acritoparamys atavus
	see Jepsen 1937
Mammalia - Dermoptera

	Planetetherium mirabile n. sp. Simpson 1928
Mammalia - Primates - Plesiadapidae

	Plesiadapis dubius (Matthew 1915)
	= Plesiadapis sp. Gervais 1877	Korth 1984
	replaces ID of Rose 1981a - indeterminate m3, discussed by Gingerich 1976

	Chiromyoides potior Gingerich 1975	Rose 1981
Mammalia - Primates - Carpolestidae

	Carpolestes nigridens n. sp. Simpson 1928
	includes "C. aquilae" as well as "Litotherium complicatum" of Simpson 1929b
Mammalia - Primates - Paromomyidae

	Phenacolemur pagei Jepsen 1930
	= Dillerlemur pagei Jepsen 1930	Rose 1981
	"Paromomyinae indet." and "Parapheliscus bjorni"

	Parapheliscus bjorni n. sp. Van Valen 1967	Van Valen 1967
	synonym of Dillerlemur pagei
	AMNH 22244 - type (right P4); referred specimen: AMNH 22245 (right P4)
Mammalia - Primates - Microsyopidae

	? Microsyopidae indet. Osborn and Wortman 1892	Rose 1981
Reptilia - Chamopsiidae

	Chamops cf. segnis Marsh 1892	Parris and Denton 2002
	teiid lizard
Reptilia - Simoedosauridae

	Simoedosaurus sp. Gervais 1877	Bartels 1983
	= Simoedosauridae indet. Lemone 1884	Brownstein 2022
Amphibia - Temnospondyli - Batrachosauroididae

	Opisthotriton sp. Auffenberg 1961	Auffenberg 1961
	salamandroid salamander
see common names

Geography

Country:	United States	State/province:	Montana	County:	Carbon
Coordinates:	45.2° North, 109.0° West (view map)
Paleocoordinates:	50.5° North, 90.0° West
Basis of coordinate:	based on political unit

Time

Period:	Paleogene
10 m.y. bin:	Cenozoic 1-2
*Period:	Tertiary	*Epoch:	Paleocene
Key time interval:	Clarkforkian
Age range of interval:	56.20000 - 54.90000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Fort Union
Stratigraphy comments: Earlier literature referred to this as the 'Polecat Bench Formation'

Lithology and environment

Primary lithology:	not reported
Environment:	terrestrial indet.

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils,mesofossils

Collection methods and comments

Collection size:	178 specimens
Reason for describing collection:	general faunal/floral analysis
Taxonomic list comments:this is one of the "principal correlatives" of the Tiffanian; placed in the Clarkforkian by Rose and by Archibald et al. 1987, but in the Tiffanian by Korth 1984 record of Adunator ("Mckennatherium") ladae of Russell is dubious because Rose 1981a could not locate the material

Metadata

Also known as:	Eagle Creek Mine; Eagle Coal Mine; Eagle Mine
Database number:	15079
Authorizer:	J. Alroy, W. Clyde, P. Mannion	Enterer:	J. Alroy, P. Mannion, W. Clyde
Modifier:	P. Mannion	Research group:	vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2021-03-16 09:28:17
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

2993.

D. E. Russell. 1967. Le Paleocene continental d'Amerique du nord. Memoires du Museum National d'Histoire Naturelle. Serie C., Sciences de la Terre 16(2):37-99 [J. Alroy/J. Alroy]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
7553		W. Auffenberg. 1961. A new genus of fossil salamander from North America. American Midland Naturalist 66(2):456-465 [J. Alroy/J. Alroy/J. Alroy]
724		W. S. Bartels. 1983. A transitional Paleocene-Eocene reptile fauna from the Bighorn Basin, Wyoming. Herpetologica 39(4):359-374 [J. Alroy/M. Sommers/M. Uhen]
82414		C. D. Brownstein. 2022. High morphological disparity in a bizarre Paleocene fauna of predatory freshwater reptiles. BMC Ecology and Evolution 22:34:1-23 [P. Mannion/P. Mannion]
1662		P. D. Gingerich. 1994. New species of Apheliscus, Haplomylus, and Hyopsodus (Mammalia, Condylarthra) from the late Paleocene of southern Montana and early Eocene of northwestern Wyoming. Contributions from the Museum of Paleontology, University of Michigan 29(6):119-134 [J. Alroy/J. Alroy/K. Beard]
2105		W. W. Korth. 1984. Earliest Tertiary evolution and radiation of rodents in North America. Bulletin of Carnegie Museum of Natural History 24:1-71 [J. Alroy/J. Alroy/J. Marcot]
7298		D. C. Parris and R.K. Denton, Jr. 2002. A teiid lizard in the early Tertiary of North America. Journal of Vertebrate Paleontology 22(3):95A [J. Alroy/J. Alroy/J. Alroy]
2953		K. D. Rose. 1981. The Clarkforkian Land-Mammal Age and Mammalian Faunal Composition Across the Paleocene-Eocene Boundary. University of Michigan Papers on Paleontology 26:1-197 [J. Alroy/J. Alroy/P. Mannion]
3401		J. G. M. Thewissen. 1990. Evolution of Paleocene and Eocene Phenacodontidae (Mammalia, Condylarthra). University of Michigan Papers on Paleontology 29:1-107 [J. Alroy/J. Alroy/P. Mannion]
44033		L. Van Valen. 1967. New Paleocene insectivores and insectivore classification. Bulletin of the American Museum of Natural History 135(5):217-284 [P. Mannion/P. Mannion]