MP-142 (Eocene of the United States)

Where: Park County, Wyoming (44.6° N, 108.6° W: paleocoordinates 49.2° N, 92.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• 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: 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 15696: authorized by John Alroy, entered by John Alroy on 21.09.1998, edited by Leah Gannon and Will Clyde

Creative Commons license: CC BY (attribution)

Taxonomic list

• may be in Big Horn County, Wa-4
Actinopteri
 Amiiformes - Amiidae
Amia sp.1 Linnaeus 1766 bowfin
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.1 de Lacep├Ęde 1803 gar
Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia1
"Crocodilia indet." = Crocodylia1 Owen 1842 crocodilian
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon sp.1 Owen 1845 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus1 Cope 1874 tillodont
 Cimolesta - Pantolestidae
? Palaeosinopa sp.1 Matthew 1901 eutherian
 Primates - Notharctidae
Cantius trigonodus1 Matthew 1915 primate
 Condylarthra - Hyopsodontidae
Hyopsodus latidens1 Denison 1937 condylarth
 Tribosphenida - Phenacodontidae
Phenacodus sp.1 Cope 1873 condylarth
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix1
"Hyracotherium pernix" = Arenahippus pernix1 Marsh 1876 horse
 Ferae - Viverravidae
Didymictis protenus2 Cope 1874 placental
Viverravus acutus2 Matthew and Granger 1915 placental
 Hyaenodonta - Hyaenodontidae
Prototomus robustus Matthew and Granger 1915 eutherian
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus1 Cope 1882 even-toed ungulate