SC-20 (Paleocene of the United States)

Where: Park County, Wyoming (44.3° N, 109.0° W: paleocoordinates 49.7° N, 90.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Clarkforkian (56.8 - 55.8 Ma)

Environment/lithology: terrestrial

Reposited in the UMMP

Primary reference: K. D. Rose. 1981. The Clarkforkian Land-Mammal Age and Mammalian Faunal Composition Across the Paleocene-Eocene Boundary. University of Michigan Papers on Paleontology 26:1-197 [J. Alroy/J. Alroy/P. Mannion]more details

PaleoDB collection 15100: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• meter level said to be 1380 by Gunnell and Gingerich 1991 but appears to be 1340 m in fig. 3; this is very discrepant
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Cimolesta -
"Esthonyx ancylion" = Azygonyx ancylion
"Esthonyx ancylion" = Azygonyx ancylion Gingerich and Gunnell 1979 tillodont
 Primates - Plesiadapidae
Plesiadapis cookei Jepsen 1930 primate
 Primates - Paromomyidae
Dillerlemur pagei1 Jepsen 1930 primate
 Rodentia - Paramyidae
Paramyidae indet.3 Miller and Gidley 1918 rodent
 Amblypoda - Prodinoceratidae
Probathyopsis praecursor Simpson 1929 uintathere
 Tribosphenida - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
 Creodonta - Oxyaenidae
Dipsalidictis platypus2 Matthew and Granger 1915 creodont