MP-122 (Eocene of the United States)

Where: Park County, Wyoming (44.6° N, 108.7° W: paleocoordinates 49.4° N, 91.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Willwood Formation, Wasatchian (55.8 - 50.3 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

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15694: authorized by John Alroy, entered by John Alroy on 27.09.1993, edited by Leah Gannon and Will Clyde

Creative Commons license: CC BY (attribution)

Taxonomic list

• 855 m level in local section, Wa-5
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.2 Agassiz 1843 gar
Reptilia
 Testudines -
Testudines indet.2 Batsch 1788 turtle
 Loricata -
Crocodylia indet.1 crocodilian
 Crocodylia - Alligatoridae
Allognathosuchus sp.2 Mook 1921 crocodilian
 Squamata -
Mammalia
 Cimolesta - Coryphodontidae
Coryphodon lobatus2 Cope 1877 pantodont
Coryphodon armatus2 Cope 1872 pantodont
 Cimolesta - Pantolestidae
Palaeosinopa veterrima2 Matthew 1901 eutherian
 Leptictida - Leptictidae
Palaeictops bicuspis2 Cope 1880 eutherian
 Primates - Microsyopidae
Microsyops angustidens2 Matthew 1915 primate
 Primates - Omomyidae
Tetonius matthewi2 Bown and Rose 1987 tarsier
originally entered as "Tetonius mathewi"
Pseudotetonius ambiguus2 Matthew 1915 tarsier
Teilhardina americana2 Bown 1976 tarsier
 Primates - Notharctidae
Cantius abditus2 Gingerich and Simons 1977 primate
 Dermoptera -
Plagiomene multicuspis2 Matthew 1918 colugo
 Rodentia - Ischyromyidae
Microparamys cheradius2 Ivy 1990 rodent
Paramys taurus2 Korth 1984 rodent
 Lipotyphla - Erinaceidae
Leipsanolestes siegfriedti2 Simpson 1928 hedgehog
 Perissodactyla -
Homogalax protapirinus2 Wortman 1896 odd-toed ungulate
Cardiolophus semihians2 Cope 1882 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix2, "Hyracotherium cristatum" = Eohippus cristatus2
"Hyracotherium pernix" = Arenahippus pernix2 Marsh 1876 horse
"Hyracotherium cristatum" = Eohippus cristatus2 Wortman 1896 horse
 Creodonta - Oxyaenidae
Oxyaena forcipata4 Cope 1874 creodont
Oxyaena intermedia2 Denison 1938 creodont
 Ferae - Viverravidae
Didymictis protenus2 Cope 1874 placental
Viverravus acutus5 Matthew and Granger 1915 placental
 Ferae -
Uintacyon rudis2 Rose 1981 placental
Vassacyon promicrodon2 Wortman and Matthew 1899 placental
 Carnivora - Miacidae
Miacis exiguus2 Matthew and Granger 1915 carnivoran
 Carnivora -
Vulpavus australis2 Matthew and Granger 1915 carnivoran
 Ferae - Metacheiromyidae
Palaeanodon ignavus2 Matthew 1918 placental
 Macroscelidea - Apheliscidae
Haplomylus scottianus n. sp.3 Gingerich 1994 elephant shrew
Apheliscus insidiosus2 Cope 1874 elephant shrew
 Tillodontia - Esthonychidae
Esthonyx bisulcatus2 Cope 1874 tillodont
 Tribosphenida - Arctocyonidae
Thryptacodon antiquus2 Matthew and Granger 1915 condylarth
? Thryptacodon antiquus2 Matthew and Granger 1915 condylarth
 Ungulata - Hyopsodontidae
Hyopsodus simplex3 Loomis 1905 condylarth
 Ungulata - Diacodexeidae
Bunophorus etsagicus3 Cope 1882 even-toed ungulate
Diacodexis metsiacus2 Cope 1882 even-toed ungulate
 Ungulata - Phenacodontidae
Phenacodus trilobatus2 Cope 1881 condylarth
Phenacodus intermedius2 Granger 1915 condylarth
Phenacodus vortmani2 Cope 1880 condylarth
 Acreodi - Mesonychidae
Pachyaena ossifraga2 Cope 1874 condylarth
 Hyaenodonta - Hyaenodontidae
Prototomus robustus2 Matthew and Granger 1915 eutherian
Prototomus phobos Gingerich and Deutsch 1989 eutherian
 Hyaenodonta -
Didelphodus absarokae2 Cope 1881 eutherian