PBDB Collection

East Clayton Quarry: Clarendonian - Hemphillian, Nebraska

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia - Perissodactyla - Equidae

	Protohippus supremus Leidy 1869	Hulbert 1989
	pers. commun.

	Calippus martini Hesse 1936	Hulbert 1989
	pers. commun.

	Calippus placidus (Leidy 1869)	Hulbert 1989
	pers. commun.

	Hipparion cf. tehonense (Merriam 1916)	Alroy 2002
	recombined as Hipparion gratum tehonense
	JA pers. obs. 1/93: "Nannippus A" of Hulbert

	Pseudhipparion gratum (Leidy 1869)	Hulbert 1989
	pers. commun.

	Cormohipparion sp. Skinner and MacFadden 1977	Skinner and MacFadden 1977
	= Hippotherium sp. Kaup 1832	Alroy 2002

	Nannippus sp. (Matthew 1926)	Mihlbachler et al. 2011
	Supplemental Table S1
Mammalia - Perissodactyla - Rhinocerotidae

	Teleoceras major Hatcher 1894	Prothero 2005

	Aphelops megalodus (Cope 1873)	Prothero 2005
Mammalia - Merycoidodontidae

	Ustatochoerus profectus (Matthew and Cook 1909)	Schultz and Falkenbach 1941
	= Merychyus novomexicanus Frick 1929	Alroy 2002
	invalid subgroup of Ustatochoerus medius
Mammalia - Tayassuidae

	Macrogenis cf. crassigenis (Matthew and Gidley 1904)	Wright 1983
Mammalia - Carnivora - Nimravidae

	Barbourofelis whitfordi (Barbour and Cook 1915)
	(1 measurement)
Mammalia - Carnivora - Procyonidae

	Lichnocyon phoenicus n. sp. Baskin 1982	Baskin 1982
	(6 measurements)
	= Protoprocyon savagei n. sp. Linares 1981	Alroy 2002
Mammalia - Carnivora - Canidae

	Leptocyon matthewi Tedford et al. 2009	Tedford et al. 2009

	Cynarctus crucidens Barbour and Cook 1914	Wang et al. 1999

	Epicyon saevus (Leidy 1858)	Wang et al. 1999

	Paratomarctus euthos (McGrew 1935)	Wang et al. 1999
	multiple specimens from "Clayton or East Clayton quarries" (so possibly not present here)

	Aelurodon taxoides Hatcher 1894	Wang et al. 1999
see common names

Geography

Country:	United States	State/province:	Nebraska	County:	Brown
Coordinates:	42.7° North, 100.0° West (view map)
Paleocoordinates:	43.0° North, 98.0° West
Basis of coordinate:	based on political unit
Geographic resolution:	small collection

Time

Period:	Neogene

*Period:	Tertiary	*Epoch:	Miocene
*International age/stage:	Tortonian	*Local age/stage:	Early/Lower Clarendonian
Key time interval:	Clarendonian - Hemphillian
Age range of interval:	12.50000 - 4.70000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Geological group:	Ogallala	Formation:	Ash Hollow	Member:	Merritt Dam
Local section:	ValAH	Local bed:	6
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

Collection excludes:	some genera
Reason for describing collection:	biostratigraphic analysis
Taxonomic list comments:equids: Hulbert 1989 pers. commun. 376 F:AM specimens: Skinner and Johnson 1984

Metadata

Database number:	18134
Authorizer:	J. Alroy, J. Marcot	Enterer:	J. Alroy, J. Marcot
Modifier:	G. Varnham	Research group:	vertebrate
Created:	1992-08-05 00:00:00	Last modified:	2022-03-01 08:27:57
Access level:	the public	Released:	1992-08-05 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

6193.

M. F. Skinner and F. W. Johnson. 1984. Tertiary stratigraphy and the Frick Collection of fossil vertebrates from north-central Nebraska. Bulletin of the American Museum of Natural History 178(3):1-368 [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]
1028	5% 29740	J. A. Baskin. 1982. Tertiary Procyoninae (Mammalia: Carnivora) of North America. Journal of Vertebrate Paleontology 2(1):71-93 [J. Alroy/J. Alroy/J. Alroy]
1952		R. C. Hulbert, Jr. 1989. Phylogenetic Interrelationships and Evolution of North American Late Equidae. In D. R. Prothero and R. M. Schoch (eds.), The Evolution of Perissodactyls [J. Alroy/J. Alroy/M. Uhen]
61275		M. C. Mihlbachler, F. Rivals, N. Solounias and G. M. Semprebon. 2011. Dietary Change and Evolution of Horses in North America. Science 331:1178-1181 [J. Marcot/J. Marcot]
51726		D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/J. Marcot]
3063		C. B. Schultz and C. H. Falkenbach. 1941. Ticholeptinae, a new subfamily of oreodonts. Bulletin of the American Museum of Natural History 79(1):1-105 [J. Alroy/J. Alroy/J. Marcot]
6240		M. F. Skinner and B. J. MacFadden. 1977. Cormohipparion n. gen. (Mammalia, Equidae) from the North American Miocene (Barstovian-Clarendonian). Journal of Paleontology 51(5):912-926 [J. Alroy/J. Alroy/J. Alroy]
52058		R. H. Tedford, X. Wang, and B. E. Taylor. 2009. Phylogenetic Systematics of the North American Fossil Caninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 325:1-218 [J. Marcot/J. Marcot/G. Lloyd]
3558		X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy]
3773		D. B. Wright. 1983. Later Miocene Tayassuidae (Artiodactyla, Mammalia) of North America. University of Nebraska, M. S. thesis 1-350 [J. Alroy/J. Alroy/J. Sepkoski]