FG-103 (Eocene of the United States)

Where: Big Horn County, Wyoming (44.5° N, 108.3° W: paleocoordinates 49.1° N, 91.7° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willwood Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

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

PaleoDB collection 15594: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Leah Gannon

Creative Commons license: CC BY (attribution)

Taxonomic list

• Wa-2
 Testudines -
Testudines indet.1 Batsch 1788 turtle
 Crocodylia - Alligatoridae
Allognathosuchus sp.1 Mook 1921 crocodilian
 Primates - Omomyidae
Tetonius sp.1 Matthew 1915 tarsier
 Primates - Notharctidae
Cantius mckennai1 Gingerich and Simons 1977 primate
 Cimolesta - Coryphodontidae
Coryphodon eocaenus1 Owen 1846 pantodont
 Perissodactyla -
"Homogalax planeticus" = Cardiolophus radinskyi1
"Homogalax planeticus" = Cardiolophus radinskyi1 Gingerich 1991 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri1
"Hyracotherium grangeri" = Sifrhippus grangeri1 Gingerich 1989 horse
 Creodonta - Oxyaenidae
Oxyaena gulo2 Matthew and Granger 1915 creodont
 Carnivora - Miacidae
Miacis deutschi1 Gingerich 1983 carnivoran
 Macroscelidea - Apheliscidae
Haplomylus speirianus1 Cope 1880 elephant shrew
 Trogontia - Esthonychidae
Esthonyx spatularius1 Cope 1880 tillodont
 Tribosphenida - Arctocyonidae
Thryptacodon antiquus1 Matthew and Granger 1915 condylarth
 Ungulata - Diacodexeidae
Diacodexis metsiacus1 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus sp.1 Cope 1873 condylarth
 Acreodi - Mesonychidae
Dissacus sp.1 Cope 1881 condylarth
 Hyaenodonta -
Prolimnocyon atavus Matthew and Granger 1915 eutherian
 Hyaenodonta - Hyaenodontidae
Prototomus martis n. sp. Gingerich and Deutsch 1989 eutherian
Arfia shoshoniensis Matthew and Granger 1915 eutherian