White Butte (Orellan) (Oligocene of the United States)

Also known as Chalky Butte; White Bluffs
DUPLICATE REF 1153 or 1154

Where: Slope County, North Dakota (46.4° N, 103.3° W: paleocoordinates 47.6° N, 94.8° W)

• coordinate based on political unit

When: lower Member (Brule Formation), Orellan (33.9 - 33.3 Ma)

Environment/lithology: terrestrial

Primary reference: J. J. Burke. 1934. New Duchesne River Rodents and a Preliminary Survey of the Adjidaumidae. Annals of Carnegie Museum 23:391-398 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17301: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• originally reported by Douglass 1909b and said to be "Middle White River"
collection of Cope is from an indeterminate locality, possible White or Chalk Butte in South Dakota: Douglass 1909b
see Kihm and Lammers 1986
record of Leptodontomys ("Adjidaumo") douglassi is Arikareean according to Korth and Bailey 1992, contra Kihm and Lammers 1986

"Brontotheriidae indet." reported by Lammers and Hoganson 1988 is from the "Chadron" of White Butte "just southeast of South Heart"
Mammalia
 Rodentia - Ischyromyidae
Ischyromys sp.2 Leidy 1856 rodent
 Rodentia - Aplodontidae
"Prosciurus albiclivus n. sp." = Altasciurus albiclivus3
"Prosciurus albiclivus n. sp." = Altasciurus albiclivus3 Korth 1994 mountain beaver
 Rodentia - Eomyidae
"Paradjidaumo cf. trilophus" = Adjidaumo trilophus5
"Paradjidaumo cf. trilophus" = Adjidaumo trilophus5 Cope 1873 rodent
"Chalky Buttes, Slope Co."; presumably includes "Gymnoptychus" of Douglass 1909b
 Rodentia - Cricetidae
Eumys elegans1 Leidy 1856 mouse
 Lagomorpha - Leporidae
Leporidae indet. Fischer de Waldheim 1817 rabbit
"Palaeolagus": Douglass 1909b DUPLICATE REF 1153 or 1154
 Theriamorpha - Geolabididae
Centetodon marginalis4 Cope 1873 placental
1954 collection from "White or Chalky Buttes, S of Amidon," Slope Co. ND; "Ictops" of Douglass 1909b
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.1 Gray 1821 rhinoceros
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Artiodactyla - Leptomerycidae
Leptomeryx evansi2 Leidy 1853 ruminant
 Artiodactyla - Merycoidodontidae
Merycoidodontidae indet.1 Cook 1912 oreodont
 Carnivora - Canidae
Hesperocyon gregarius6 Cope 1873 canid
"upper 10 ft of nodules"