MP-158 (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. Polly. 1997. Ancestry and Species Definition in Paleontology: A Stratocladistic Analysis of Paleocene-Eocene Viverravidae (Mammalia, Carnivora) from Wyoming. Contributions from the Museum of Paleontology, University of Michigan 30(1):1-53 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 15702: 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
Reptilia
 Testudines -
Testudines indet. Batsch 1788 turtle
 Crocodylia - Alligatoridae
Allognathosuchus sp. Mook 1921 crocodilian
Mammalia
 Macroscelidea - Apheliscidae
Haplomylus scottianus Gingerich 1994 elephant shrew
 Condylarthra - Hyopsodontidae
Hyopsodus latidens Denison 1937 condylarth
 Rodentia - Ischyromyidae
Paramys ? copei Loomis 1907 rodent
Acritoparamys atwateri Loomis 1907 rodent
 Dermoptera -
Plagiomene multicuspis Matthew 1918 colugo
 Primates - Notharctidae
Cantius trigonodus Matthew 1915 primate
 Primates - Microsyopidae
Microsyops angustidens Matthew 1915 primate
 Primates - Omomyidae
Tetonius matthewi Bown and Rose 1987 tarsier
originally entered as "Tetonius mathewi"
 Acreodi - Mesonychidae
Pachyaena gracilis Matthew and Granger 1915 condylarth
 Creodonta - Oxyaenidae
Oxyaena forcipata Cope 1874 creodont
 Creodonta - Hyaenodontidae
Arfia opisthotoma Matthew 1901 creodont
 Theriamorpha -
Miacis exiguus Matthew and Granger 1915 placental
Miacis ? petilus Gingerich 1983 placental
? Vulpavus australis Matthew and Granger 1915 placental
 Theriamorpha - Viverravidae
Didymictis protenus Cope 1874 placental
Viverravus acutus Matthew and Granger 1915 placental
 Theriamorpha - Metacheiromyidae
Palaeanodon nievelti Gingerich 1989 placental
 Artiodactyla - Diacodexeidae
Diacodexis metsiacus, "Diacodexis robustus" = Bunophorus robustus
Diacodexis metsiacus Cope 1882 even-toed ungulate
"Diacodexis robustus" = Bunophorus robustus Sinclair 1914 even-toed ungulate
 Procreodi - Arctocyonidae
Thryptacodon antiquus Matthew and Granger 1915 condylarth
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
Phenacodus trilobatus Cope 1881 condylarth
Phenacodus intermedius Granger 1915 condylarth
 Perissodactyla -
Homogalax protapirinus, "Hyracotherium cristatum" = Systemodon tapirinus
Homogalax protapirinus Wortman 1896 odd-toed ungulate
"Hyracotherium cristatum" = Systemodon tapirinus Cope 1875 odd-toed ungulate
 Perissodactyla - Equidae
"Hyracotherium pernix" = Arenahippus pernix
"Hyracotherium pernix" = Arenahippus pernix Marsh 1876 horse
 Theriamorpha - Pantolestoidae
Palaeosinopa veterrima Matthew 1901 placental
Palaeosinopa ? veterrima Matthew 1901 placental
 Cimolesta - Coryphodontidae
Coryphodon radians Cope 1872 pantodont
 Cimolesta - Esthonychidae
Esthonyx bisulcatus Cope 1874 tillodont
 Theriamorpha - Leptictidae
Palaeictops bicuspis Cope 1880 eutherian