WW-73 (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

• "Purple 3" is one of four distinct & laterally traceable paleosols above "Red 1" in the South Section of Sand Creek Divide. The matrix color of the three purple paleosols varies laterally between purple and red. P3 has a distinct yellow top, and this paleosol can be correlated to a yellow-purple couplet at ~15 m level in

•the North section.

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 154253: authorized by Jonathan Bloch, entered by Jonathan Bloch on 06.02.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp.
Coryphodon sp. Owen 1845 pantodont
 Cimolesta - Esthonychidae
"Azygonyx gunnelli" = Esthonyx gunnelli
"Azygonyx gunnelli" = Esthonyx gunnelli Gingerich 1989 tillodont
Unnumbered localities: USNM 511054 (associated L foot bones including cuboid, fragmentary metatarsals, phalanges), from approximate level of Purple 3 (same level as WW-73?)
 Condylarthra - Hyopsodontidae
Hyopsodus loomisi
Hyopsodus loomisi McKenna 1960 condylarth
 Macroscelidea - Amphilemuridae
Macrocranion junnei
Macrocranion junnei Smith et al. 2002 elephant shrew
 Creodonta - Hyaenodontidae
Arfia junnei
Arfia junnei Gingerich 1989 creodont
 Ferae - Metacheiromyidae
Palaeanodon nievelti
Palaeanodon nievelti Gingerich 1989 placental
 Tribosphenida - Phenacodontidae
Ectocion parvus
Ectocion parvus Granger 1915 condylarth
 Perissodactyla - Equidae
"Hyracotherium sandrae" = Sifrhippus sandrae
"Hyracotherium sandrae" = Sifrhippus sandrae Gingerich 1989 horse
 Procreodi - Arctocyonidae
Chriacus badgleyi
Chriacus badgleyi Gingerich 1989 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis ilicis
Diacodexis ilicis Gingerich 1989 even-toed ungulate
 Acreodi - Mesonychidae
Dissacus praenuntius
Dissacus praenuntius Matthew and Granger 1915 condylarth
tentatively identified postcrania