SC-435 Shell Bed (Paleocene to of the United States)

Where: Wyoming (44.8° N, 108.9° W: paleocoordinates 49.8° N, 91.1° W)

When: Willwood Formation, Late/Upper Paleocene to Late/Upper Paleocene (58.7 - 48.6 Ma)

Environment/lithology: fluvial; lithified siliciclastic sediments

Size classes: macrofossils, mesofossils

Reposited in the UMMP

Primary reference: P. D. Gingerich and T. Smith. 2006. Paleocene-Eocene land mammals from three new latest Clarkforkian and earliest Wasatchian wash sites at Polecat Bench in the northern Bighorn Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 31(11):245-303 [C. Beard/C. Beard]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 80579: authorized by K. Christopher Beard, entered by K. Christopher Beard on 28.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Multituberculata - Neoplagiaulacidae
Ectypodus powelli Jepsen 1940 multituberculate
 Cimolesta - Apatemyidae
Labidolemur kayi Simpson 1929 eutherian
 Macroscelidea - Apheliscidae
Apheliscus nitidus Simpson 1937 elephant shrew
Haplomylus simpsoni Rose 1981 elephant shrew
Aletodon gunnelli Gingerich 1977 elephant shrew
 Theriamorpha -
Uintacyon rudis Rose 1981 placental
 Theriamorpha - Viverravidae
Viverravus rosei Polly 1997 placental
 Theriamorpha - Phenacodontidae
Ectocion osbornianus Cope 1882 condylarth
 Theriamorpha - Nyctitheriidae
Wyonycteris chalix Gingerich 1987 placental
"Leptacodon rosei" = Plagioctenodon rosei Gingerich 1987 placental
 Rodentia - Ischyromyidae
Microparamys cheradius Ivy 1990 rodent
 Primates - Microsyopidae
Niptomomys doreenae McKenna 1960 primate
 Primates - Paromomyidae
Phenacolemur praecox Matthew 1915 primate
 Theriamorpha - Peradectidae
Peradectes protinnominatus McKenna 1960 marsupial