MP-136 (Eocene of the United States)

Also known as USGS D-1152

Where: Wyoming (44.7° N, 108.7° W: paleocoordinates 49.5° N, 91.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Wa-2

• 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: W. C. Clyde. 1997. Stratigraphy and mammalian paleontology of the McCullough Peaks, northern Bighorn Basin, Wyoming: Implications for biochronology, basin development, and community reorganization across the Paleocene-Eocene boundary. PhD Thesis, University of Michigan [W. Clyde/W. Clyde/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 46727: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Pisces
  -
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish
Mammalia
 Condylarthra - Hyopsodontidae
Hyopsodus loomisi McKenna 1960 condylarth
 Macroscelidea - Apheliscidae
Apheliscus chydaeus Gingerich 1994 elephant shrew
Haplomylus speirianus Cope 1880 elephant shrew
 Theriamorpha - Phenacodontidae
Ectocion osbornianus Cope 1882 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
 Theriamorpha - Viverravidae
Viverravus gracilis Marsh 1872 placental
 Theriamorpha -
Miacis exiguus Matthew and Granger 1915 placental
 Creodonta - Oxyaenidae
Oxyaena sp. Cope 1874 creodont
 Placentalia -
Rodentia indet. Bowdich 1821 rodent
 Primates - Notharctidae
Cantius mckennai Gingerich and Simons 1977 primate
 Multituberculata - Eucosmodontidae
"Neoliotomus ultimus" = Eucosmodon ultimus
"Neoliotomus ultimus" = Eucosmodon ultimus Granger and Simpson 1928 multituberculate
Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
Aves
  -
Aves indet. Linnaeus 1758 bird