Antelope Creek (SDSM V582)
Basic information
Sample name: Antelope Creek (SDSM V582)

Sample aka: Slim Buttes

Reference: P. R. Bjork. 1967. Latest Eocene vertebrates from northwestern South Dakota. Journal of Paleontology 41(1):227-236 [ER 4141]
Geography
Country: United States

State: South Dakota

County: Harding

Coordinate: 45.34° N, -103.14° W
Latlng basis: based on political unit

Formation: Slim Buttes

Time interval: Late Eocene

Zone: Duchesnean

Ma: 39.1

Age basis: AEO

Geography comments: "from within a mile of the type section" of the Slim Buttes Formation "on Antelope Creek" within T. 16 N., R. 8 E. (coordinate based on the midpoint of this township and range, which is in an area of badlands)
thought to be Duchesnean

•
Environment
Lithology: siliciclastic (mixed)

Taphonomic context: fluvial deposit

Habitat comments: "The Slim Buttes Formation is a thin sequence of variegated sands, silts, and clays"
the presence of a gar and Allognathosuchus "suggests that a permanently flowing river was present" and Amynodontopsis "is indicative of a stream environment"

Methods
Life forms: ungulates, turtles, other reptiles, fishes

Sample size: 26 specimens

Museum: South Dakota School of Mines

Net or trap nights: 0

Basal area status: not applicable

Sampling comments: no details of collection methoeds are given

Metadata
Sample no: 4598

Contributor no: John Alroy

Enterer: John Alroy

Modifier no: John Alroy

Created: 2024-12-11 10:03:45

Modified: 2024-12-11 10:18:33

Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
10 species
4 singletons
total count 26
geometric series index: 25.0
Fisher's α: 5.949
geometric series k: 0.8195
Hurlbert's PIE: 0.8431
Shannon's H: 2.071
Good's u: 0.8521
Register
Lepisosteus sp. 1
Graptemys sp. 2
?
Trionychidae indet.1
Allognathosuchus riggsi = †Alligator cf. prenasalis 1
Epihippus intermedius = †Duchesnehippus intermedius 3
Teleodus thyboi = †Duchesneodus uintensis 6
type
†Colodon ? cingulatus 2
†Amynodontopsis bodei 6
Agriochoeridae indet.1
Leptotragulinae indet.3