FG-24 (Eocene of the United States)

Where: Big Horn County, Wyoming (44.6° N, 108.5° W: paleocoordinates 49.4° N, 91.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified siliciclastic sediments

Size classes: macrofossils, mesofossils

Reposited in the UMMP

Collection methods: surface (float), surface (in situ),

Primary reference: P. D. Gingerich and H. A. Deutsch. 1989. Systematics and Evolution of Early Eocene Hyaenodontidae (Mammalia, Creodonta) in the Clarks Fork Basin, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 27(13):327-391 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15588: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Leah Gannon

Creative Commons license: CC BY (attribution)

Taxonomic list

• Zone Wa-2
Mammalia
 Cimolesta - Esthonychidae
Esthonyx spatularius Cope 1880 tillodont
 Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960 condylarth
 Macroscelidea - Apheliscidae
Haplomylus speirianus Cope 1880 elephant shrew
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
 Procreodi - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Creodonta - Hyaenodontidae
Prototomus martis Gingerich and Deutsch 1989 creodont
Arfia shoshoniensis Matthew and Granger 1915 creodont
 Primates - Notharctidae
Cantius mckennai Gingerich and Simons 1977 primate