WW-77 (Eocene of the United States)

Where: Washakie County County, Wyoming (44.2° N, 107.9° W: paleocoordinates 48.7° N, 91.3° W)

• coordinate stated in text

When: Wa-0 mammal zone, Willwood Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

Environment/lithology: "floodplain"lithified, paleosol/pedogenic, muddy

• in orange immediately above Purple 3 and in gray sandy silt overlying orange bed

Primary reference: K. D. Rose, A. E. Chew, R. H. Dunn, M. J. Kraus, H. C. Fricke and S. P. Zack. 2012. Earliest Eocene mammalian fauna from the Paleocene-Eocene Thermal Maximum at Sand Creek Divide, southern Bighorn Basin, Wyoming. University of Michigan Papers on Paleontology 36:1-122 [J. Bloch/J. Bloch]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 154257: authorized by Jonathan Bloch, entered by Jonathan Bloch on 06.02.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Primates - Microsyopidae
Arctodontomys wilsoni Szalay 1969 primate
 Primates - Omomyidae
Teilhardina brandti Gingerich 1993 tarsier
 Glires -
Rodentia indet. Savage 1951 rodent
 Rodentia - Cylindrodontidae
Tuscahomys cf. major Dawson and Beard 2007 rodent
 Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960 condylarth
 Tribosphenida - Phenacodontidae
Ectocion parvus Granger 1915 condylarth
additional specimen said to be "2 m above WW-77"
Copecion davisi Gingerich 1989 condylarth
Phenacodus intermedius Granger 1915 condylarth
 Perissodactyla - Equidae
"Hyracotherium sandrae" = Sifrhippus sandrae
"Hyracotherium sandrae" = Sifrhippus sandrae Gingerich 1989 horse
 Ferae - Viverravidae
Didymictis leptomylus Cope 1880 placental
 Hyaenodonta - Hyaenodontidae
Arfia junnei Gingerich 1989 eutherian
 Hyaenodonta -
Didelphodus sp. Cope 1882 eutherian
 Theriiformes - Peradectidae
Mimoperadectes labrus Bown and Rose 1979 metatherian