Bartlett High (Oligocene of the United States)

Where: Dawes County, Nebraska (42.8° N, 103.1° W: paleocoordinates 44.0° N, 95.0° W)

• coordinate based on political unit

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

Environment/lithology: terrestrial

Primary reference: E. P. Gustafson. 1986. Preliminary biostratigraphy of the White River Group (Oligocene, Chadron and Brule formations) in the vicinity of Chadron, Nebraska. Transactions of the Nebraska Academy of Sciences 14:7-20 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 17062: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• in a reversed polarity zone above the Orella B normal zone and 18.3 m below the top of the member, i.e., in Orella C
includes CSC-73 Bartlett High CSC-77 Bartlett Dike Valley (highest level) CSC-86 Anderson High
Bartlett Ranch, level not indicated: Paratylopus labiatus Prothero 1996d
NISP 41, excluding indeterminate rhino
Mammalia
 Carnivora - Amphicyonidae
Daphoenus hartshornianus Cope 1873 bear-dog
 Carnivora - Canidae
Hesperocyon gregarius Cope 1873 canid
 Perissodactyla - Equidae
Mesohippus bairdi Leidy 1850 anchitheriine horse
 Perissodactyla -
Rhinocerotoidea indet. Gray 1821 odd-toed ungulate
"larger rhino", a hyracodontid or rhinocerotid
 Perissodactyla - Hyracodontidae
Hyracodon nebraskensis Leidy 1850 odd-toed ungulate
 Artiodactyla - Camelidae
Poebrotherium wilsoni Leidy 1847 camel
 Artiodactyla - Merycoidodontidae
Merycoidodon sp. Leidy 1848 oreodont
Miniochoerus gracilis Leidy 1851 oreodont
 Artiodactyla - Hypisodontidae
Hypisodus minimus Cope 1873 ruminant
 Artiodactyla - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
 Rodentia - Ischyromyidae
Ischyromys typus Leidy 1856 rodent
 Lagomorpha - Leporidae
Palaeolagus haydeni Leidy 1856 rabbit