MP-29 (Eocene of the United States)

Where: Wyoming (44.4° N, 108.7° W: paleocoordinates 49.2° N, 91.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Wa-6

• 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 46692: authorized by Will Clyde, entered by Will Clyde on 24.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Amiiformes - Amiidae
Amia sp. Linnaeus 1766 bowfin
Reptilia
 Squamata -
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp. Owen 1845 pantodont
 Leptictida - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian
 Primates - Microsyopidae
Microsyops latidens Cope 1882 primate
 Primates - Omomyidae
Absarokius metoecus Bown and Rose 1987 tarsier
originally entered as "Absarokius motoecus"
 Primates - Notharctidae
Cantius abditus Gingerich and Simons 1977 primate
 Rodentia - Ischyromyidae
Paramys large sp. Leidy 1871 rodent
 Perissodactyla -
Homogalax protapirinus Wortman 1896 odd-toed ungulate
Heptodon calciculus Cope 1880 odd-toed ungulate
Cardiolophus semihians Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium grangeri" = Sifrhippus grangeri, "Hyracotherium pernix" = Arenahippus pernix, "Hyracotherium cristatum" = Eohippus cristatus
"Hyracotherium grangeri" = Sifrhippus grangeri Gingerich 1989 horse
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
"Hyracotherium cristatum" = Eohippus cristatus Wortman 1896 horse
 Ferae -
Uintacyon rudis Rose 1981 placental
 Tillodontia - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
Chriacus gallinae Matthew and Granger 1915 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus lysitensis Gingerich 1974 condylarth
Hyopsodus minor Loomis 1905 condylarth
Hyopsodus powellianus Cope 1884 condylarth
 Ungulata - Diacodexeidae
Diacodexis metsiacus Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
 Hyaenodonta -
Didelphodus absarokae Cope 1881 eutherian