PBDB Collection

Peanut Peak: Chadronian, South Dakota

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia - Leptictidae

	Ictops dakotensis Leidy 1868
	recombined as Leptictis dakotensis
Mammalia - Creodonta - Hyaenodontidae

	Hyaenodon cf. montanus Douglass 1902

	Hyaenodon cf. cruentus Leidy 1853
	= Hyaenodon cf. horridus Leidy 1853	Alroy 2002
Mammalia - Carnivora - Subparictidae

	Parictis dakotensis n. sp. Clark 1936
	recombined as Subparictis dakotensis
	see Clark and Guensburg 1972: from "probably Peanut Peak Member, Big Corral Draw, Washington (now Shannon) County"
Mammalia - Carnivora - Ursidae

	Parictis major n. sp. Clark and Guensburg 1972	Clark and Guensburg 1972
	NE 1/4 SE 1/4 sec 12 T42N R45W Shannon Co.; placed in this mbr. by Baskin and Tedford 1996
Mammalia - Carnivora - Mustelidae

	Mustelavus priscus n. sp. Clark 1936
	see also Baskin and Tedford 1996
Mammalia - Carnivora - Amphicyonidae

	Daphoenocyon dodgei (Scott 1898)
	recombined as Brachyrhynchocyon dodgei

	Daphoenus sp. Leidy 1853	Hunt 1998
Mammalia - Carnivora - Canidae

	Hesperocyon gregarius (Cope 1873)
Mammalia - Carnivora - Nimravidae

	Dinictis fortis Adams 1895
	= Dinictis felina Leidy 1854	Alroy 2002

	Hoplophoneus oharrai n. sp. Jepsen 1926
	(1 measurement)
Mammalia - Perissodactyla - Equidae

	Mesohippus celer (Marsh 1874)
	(1 measurement)
	= Mesohippus bairdi Leidy 1850	Alroy 2002
	and "M. latidens"; Forsten 1970b places this at "W flank Quinn Draw"; "NE point of Finney Breaks, Custer Co."; Granath Quarry; and coordinates at Cottonwood Pass, S of Cottonwood Pass, and NW of Sheep Mountain Table

	Mesohippus exoletus (Cope 1874)	Prothero and Shubin 1989
	5 ft below top of Chadron, Red Shirt Table, Shannon Co.

	Mesohippus grandis n. sp. Clark and Beerbower 1967
	recombined as Miohippus grandis
Mammalia - Perissodactyla - Brontotheriidae

	Menodus sp. (Pomel 1848)
	= Brontotheriidae indet. Marsh 1873	Alroy 2002
	see Mader 1989

	Brontops robustus n. sp. Marsh 1887	Osborn 1929
	from "upper Titanotherium zone... Corral Draw"; also skeleton of "Titanotherium robustum" Osborn and Wortman 1895 from "upper Titanotherium beds... near the head of Corral Canon"

	Brontotherium curtum (Marsh 1887)
	recombined as Megacerops curtus

	Allops serotinus n. sp. Marsh 1887
	recombined as Menops serotinus

	Megacerops marshi n. sp. Osborn 1902
	recombined as Menops marshi
Mammalia - Perissodactyla - Rhinocerotidae

	Trigonias wellsi n. sp. Wood 1927	Wood 1927
	from "Upper Titanotherium Beds, Corral Draw"

	Trigonias gregoryi n. sp. Wood 1927
	synonym of Trigonias wellsi

	Caenopus mitis (Cope 1875)
	recombined as Subhyracodon mitis

	Aceratherium trigonodum n. sp. Osborn and Wortman 1894
	synonym of Subhyracodon occidentalis
	(3 measurements)
Mammalia - Perissodactyla - Hyracodontidae

	Hyracodon cf. priscidens Lambe 1905
Mammalia - Anthracotheriidae

	Aepinacodon deflectus n. sp. (Marsh 1890)	Macdonald 1956
	discussed by Troxell 1921a without indication of exact level

	Aepinacodon americanus n. sp. (Leidy 1856)	Macdonald 1956
	this and the next record surely include "Bothriodon sp." because Clark would have followed Scott's taxonomy
Mammalia - Entelodontidae

	Archaeotherium scotti n. sp. Sinclair 1922
Mammalia - Merycoidodontidae

	Merycoidodon lewisi n. sp. Clark and Beerbower 1967
	synonym of Merycoidodon culbertsonii
Mammalia - Camelidae

	Poebrotherium sp. Leidy 1847	Wilson 1974
	FMNH specimen from Shannon Co.
Mammalia - Protoceratidae

	Leptotragulus profectus Matthew 1903
	recombined as Trigenicus profectus
	(1 measurement)

	Poabromylus minor Wilson 1974
	recombined as Pseudoprotoceras minor
Mammalia - Hypertragulidae

	Hypertragulidae indet. Cope 1879
Mammalia - Apternodontidae

	Apternodus mediaevus Matthew 1903
see common names

Geography

Country:	United States	State/province:	South Dakota	County:	Shannon
Coordinates:	43.3° North, 102.5° West (view map)
Paleocoordinates:	44.6° North, 93.7° West
Basis of coordinate:	based on political unit

Time

Period:	Paleogene	Epoch:	Eocene
Stage:	Priabonian	10 m.y. bin:	Cenozoic 3
*Period:	Tertiary
Key time interval:	Chadronian
Age range of interval:	37.00000 - 33.90000 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Chadron	Member:	Peanut Peak
Local section:	BgBad	Local bed:	3
Local order:	bottom to top

Lithology and environment

Environment:

terrestrial indet.

Taphonomy

Modes of preservation:

body

Collection methods and comments

Reason for describing collection:	paleoecologic analysis
Taxonomic list comments:"upper Chadron" or "Upper Titanotherium Beds" records are retained here because the Peanut Peak is present wherever the lower members outcrop Wood 1927 mentions a specimen from "the Upper Tianotherium Beds, Cane Creek, South Dakota" that he compares to Amphicaenopus platycephalum

Metadata

Database number:	17006
Authorizer:	J. Alroy	Enterer:	J. Alroy
Modifier:	J. Alroy	Research group:	vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2006-09-13 00:29:51
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC BY

Reference information

Primary reference:

1235.

ETE 10023

J. Clark and J. R. Beerbower. 1967. Geology, paleoecology, and paleoclimatology of the Chadron Formation. Fieldiana 5(5):21-74 [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]
1238		J. Clark and T. E. Guensburg. 1972. Arctoid genetic characters as related to the genus Parictis. Fieldiana 26(1):1-71 [J. Alroy/J. Alroy/J. Marcot]
1977		R. M. Hunt, Jr. 1998. Amphicyonidae. 196-227 [J. Alroy/J. Alroy/J. Alroy]
2346		J. R. Macdonald. 1956. The North American anthracotheres. Journal of Paleontology 30(3):615-645 [J. Alroy/J. Alroy/J. Alroy]
2698		H. F. Osborn. 1902. The four phyla of Oligocene titanotheres. Bulletin of the American Museum of Natural History 16(8):91-109 [J. Alroy/J. Alroy/T. Liebrecht]
2708		H. F. Osborn. 1929. New Eurasiatic and American proboscideans. American Museum Novitates 393:1-22 [J. Alroy/J. Alroy/M. Carrano]
2711		H. F. Osborn and J. L. Wortman. 1894. Fossil mammals of the Lower Miocene White River beds. Collection of 1892. Bulletin of the American Museum of Natural History 6(7):199-228 [J. Alroy/J. Alroy/M. Carrano]
6273		D. R. Prothero and N. Shubin. 1989. The evolution of Oligocene horses. In D. R. Prothero and R. M. Schoch (eds.), The Evolution of Perissodactyls 142-175 [J. Alroy/J. Alroy/J. Marcot]
3167		W. J. Sinclair. 1922. Entelodonts from the Big Badlands of South Dakota in the geological museum of Princeton University. Proceedings of the American Philosophical Society 60:467-495 [J. Alroy/J. Alroy/J. Alroy]
3663		J. A. Wilson. 1974. Early Tertiary Vertebrate Faunas, Vieja Group and Buck Hill Group, Trans-Pecos Texas: Protoceratidae, Camelidae, Hypertragulidae. Bulletin of the Texas Memorial Museum 23:1-24 [J. Alroy/J. Alroy/J. Marcot]
3741		H. E. Wood. 1927. Some early Tertiary rhinoceroses and hyracodonts. Bulletins of American Paleontology 13(50):1-105 [J. Alroy/J. Alroy/J. Marcot]