SC-16 (Eocene of the United States)

Where: Park County, Wyoming (44.8° N, 109.1° W: paleocoordinates 49.7° N, 91.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: "channel"; poorly lithified, gray sandstone

• "a proximal channel depositional environment, such as a ponded or point bar deposit"
• Hyracotherium specimen is from "a weakly-cemented, light gray sandstone (~0.5 m in thickness)" directly over a paleosol

Size class: macrofossils

Reposited in the UMMP

Primary reference: G. F. Gunnell. 1985. Systematics of Early Eocene Microsyopinae (Mammalia, Primates) in the Clark's Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(2):51-71 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15735: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

• meter level given by Gunnell and Gingerich 1991
Mammalia
 Primates - Microsyopidae
Arctodontomys wilsoni Szalay 1969 primate
 Perissodactyla -
Cardiolophus radinskyi1 Gingerich 1991 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri1
"Hyracotherium grangeri" = Sifrhippus grangeri1 Gingerich 1989 horse
see also Wood et al. 2011
 Creodonta - Oxyaenidae
Dipsalidictis transiens3 Matthew and Granger 1915 creodont
 Creodonta - Hyaenodontidae
Prototomus phobos2 Gingerich and Deutsch 1989 creodont