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FG-25, Big Horn County, Wyoming, USA

Lat/Long (Decimal)	44.6253,-108.502
Co-ordinates Derivation	estimated from map
Given Location	Wyoming, United States
Mindat.org Region (for given coordinates)	Big Horn County, Wyoming, USA

Collections

Collection	Reference	Stratigraphic Name	Comments	Lithology	Age
FG-25	Krause D. W. (1982)	Willwood		"siliciclastic"	55.8 - 48.6 Ma Eocene

Recorded Fossils

Accepted Name	Hierarchy	Age
Pachyaena gracilis species	Animalia : Chordata : Mammalia : Cetacea : Mesonychidae : Pachyaena : *Pachyaena gracilis*	55.8 - 48.6 Ma Eocene
Wyolestes apheles species	Animalia : Chordata : Mammalia : Pilosa : Didymoconidae : Wyolestes : *Wyolestes apheles*	55.8 - 48.6 Ma Eocene
Diacodexis metsiacus species	Animalia : Chordata : Mammalia : Artiodactyla : Diacodexeidae : Diacodexis : *Diacodexis metsiacus*	55.8 - 48.6 Ma Eocene
Coryphodon eocaenus species	Animalia : Chordata : Mammalia : Cimolesta : Coryphodontidae : Coryphodon : *Coryphodon eocaenus*	55.8 - 48.6 Ma Eocene
Hyopsodus loomisi species	Animalia : Chordata : Mammalia : Hyopsodontidae : Hyopsodus : *Hyopsodus loomisi*	55.8 - 48.6 Ma Eocene
Oxyaena gulo species	Oxyaenidae : Oxyaena : *Oxyaena gulo*	55.8 - 48.6 Ma Eocene
Arfia shoshoniensis species	Animalia : Chordata : Mammalia : Hyaenodonta : Hyaenodontidae : Arfia : *Arfia shoshoniensis*	55.8 - 48.6 Ma Eocene
Prototomus phobos species	Animalia : Chordata : Mammalia : Hyaenodontidae : Prototomus : *Prototomus phobos*	55.8 - 48.6 Ma Eocene
Haplomylus speirianus species	Animalia : Chordata : Mammalia : Macroscelidea : Apheliscidae : Haplomylus : *Haplomylus speirianus*	55.8 - 48.6 Ma Eocene
Neoliotomus ultimus species	Animalia : Chordata : Mammalia : Eucosmodontidae : Neoliotomus : *Eucosmodon ultimus*	55.8 - 48.6 Ma Eocene
Thryptacodon antiquus species	Animalia : Chordata : Mammalia : Arctocyonidae : Thryptacodon : *Thryptacodon antiquus*	55.8 - 48.6 Ma Eocene
Palaeictops bicuspis		55.8 - 48.6 Ma Eocene
Uintacyon rudis species	Animalia : Chordata : Mammalia : Carnivora : Miacidae : Uintacyon : *Uintacyon rudis*	55.8 - 48.6 Ma Eocene
Didymictis protenus species	Animalia : Chordata : Mammalia : Viverravidae : Didymictis : *Didymictis protenus*	55.8 - 48.6 Ma Eocene
Viverravus acutus species	Animalia : Chordata : Mammalia : Carnivora : Viverravidae : Viverravus : *Viverravus acutus*	55.8 - 48.6 Ma Eocene
Sifrhippus grangeri species	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Sifrhippus : *Hyracotherium grangeri*	55.8 - 48.6 Ma Eocene
Arctodontomys wilsoni species	Animalia : Chordata : Mammalia : Primates : Microsyopidae : Arctodontomys : *Arctodontomys wilsoni*	55.8 - 48.6 Ma Eocene
Cantius ralstoni species	Animalia : Chordata : Mammalia : Primates : Notharctidae : Cantius : *Cantius ralstoni*	55.8 - 48.6 Ma Eocene
Acritoparamys atwateri species	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : Acritoparamys : *Acritoparamys atwateri*	55.8 - 48.6 Ma Eocene
Paramys sp. genus	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Paramys*	55.8 - 48.6 Ma Eocene
Paramys pycnus species	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : Paramys : *Paramys pycnus*	55.8 - 48.6 Ma Eocene
Esthonyx spatularius species	Animalia : Chordata : Mammalia : Tillotheriidae : Esthonyx : *Esthonyx spatularius*	55.8 - 48.6 Ma Eocene
Azygonyx sp. genus	Animalia : Chordata : Mammalia : Tillotheriidae : *Azygonyx*	55.8 - 48.6 Ma Eocene
Ectocion osbornianus species	Animalia : Chordata : Mammalia : Ungulata : Phenacodontidae : Ectocion : *Ectocion osbornianus*	55.8 - 48.6 Ma Eocene
Phenacodus vortmani species	Animalia : Chordata : Mammalia : Phenacodontidae : Phenacodus : *Hyracotherium vortmani*	55.8 - 48.6 Ma Eocene
Allognathosuchus sp. genus	Animalia : Chordata : Reptilia : Crocodylia : Crocodylidae : *Allognathosuchus*	55.8 - 48.6 Ma Eocene
Lacertilia suborder	Animalia : Chordata : Reptilia : Squamata : Lacertilia	55.8 - 48.6 Ma Eocene
Paraglyptosaurus sp. genus	Animalia : Chordata : Reptilia : Squamata : Anguidae : *Paraglyptosaurus*	55.8 - 48.6 Ma Eocene

References

Gingerich P. D. (1981) Radiation of Early Cenozoic Didymoconidae (Condylarthra, Mesonychia) in Asia, with a New Genus from the Early Eocene of Western North America, Journal of Mammalogy 62 3, 526-538

Krause D. W. (1982) Multituberculates from the Wasatchian Land-Mammal Age, Early Eocene, of Western North America, Journal of Paleontology 56 2, 271-294

Gunnell G. F. (1985) Systematics of Early Eocene Microsyopinae (Mammalia, Primates) in the Clark's Fork Basin, Wyoming, Contributions from the Museum of Paleontology, University of Michigan 27 2, 51-71

Gingerich P. D., Deutsch H. A. (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

Ivy L. D. (1990) Systematics of Late Paleocene and Early Eocene Rodentia (Mammalia) from the Clarks Fork Basin, Wyoming, Contributions from the Museum of Paleontology, University of Michigan 28 2, 21-70

Clyde W. C. (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

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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