SC-23 (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 15103: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Will Clyde

Creative Commons license: CC BY (attribution)

Taxonomic list

 Squamata - Anguidae
Melanosaurus maximus2 Gilmore 1928 lizard
 Primates - Microsyopidae
Niptomomys doreenae McKenna 1960 primate
 Dermoptera -
Worlandia inusitata Bown and Rose 1979 colugo
 Rodentia - Paramyidae
Paramyidae indet.3 Miller and Gidley 1918 rodent
 Creodonta - Oxyaenidae
Dipsalidictis sp.1 Matthew and Granger 1915 creodont
 Ferae - Viverravidae
Didymictis protenus Cope 1874 placental
Viverravus politus Matthew and Granger 1915 placental
confirmed by Polly 1997
 Macroscelidea - Apheliscidae
Haplomylus simpsoni Rose 1981 elephant shrew
 Ungulata - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
Phenacodus intermedius5 Granger 1915 condylarth
 Acreodi - Mesonychidae
Dissacus praenuntius4 Matthew and Granger 1915 condylarth
YPM-PU specimen from same quarter of same section as SC-23, 24, and 25, but closest to SC-23, and Rose 1981a mentions a PU specimen from the "vicinity of SC-23" DUPLICATE REF 2677 or 2678