Dillon Pass (South) (Oligocene of the United States)

Also known as SDSM Collection III

Where: Pennington County, South Dakota (43.9° N, 102.4° W: paleocoordinates 45.0° N, 94.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

• Lower Nodular Zone

Environment/lithology: terrestrial

Reposited in the SDSM

Primary reference: J. Clark and K. K. Kietzke. 1967. Paleoecology of the Lower Nodular Zone, Brule Formation, in the Big Badlands of South Dakota. Fieldiana 5(7):111-137 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 17103: authorized by John Alroy, entered by John Alroy on 18.10.1995

Creative Commons license: CC BY (attribution)

Taxonomic list

• about 1/2 mile south of the preceding locality
species-level i.d.s based on Damuth 1982, except for M. culberstoni
NISP 66
"Leptauchenia sp." is omitted by Damuth
Mammalia
 Carnivora - Nimravidae
Dinictis sp. Leidy 1854 false sabre-tooth
 Artiodactyla - Merycoidodontidae
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii Leidy 1848 oreodont
 Artiodactyla - Leptomerycidae
Leptomeryx evansi Leidy 1853 ruminant
 Artiodactyla - Agriochoeridae
Agriochoerus antiquus Leidy 1850 agriochoerid
 Artiodactyla - Hypertragulidae
Hypertragulus calcaratus Cope 1873 ruminant
 Perissodactyla - Hyracodontidae
Hyracodon nebraskensis Leidy 1850 odd-toed ungulate
 Lagomorpha - Leporidae
Palaeolagus haydeni Leidy 1856 rabbit
 Rodentia - Ischyromyidae
Ischyromys typus Leidy 1856 rodent
Reptilia
 Testudines - Testudinidae
Stylemys sp. Leidy 1851 turtle