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Dunbar Creek, Montana, USA

Formation	Dunbar Creek
Age:	33.9 - 33.3 Ma Oligocene
Interval	Late Chadronian
Lithology	siltstone
Number of Collections	2
Number of Occurrences	20

Recorded Sample Locations

Location	Region	Stratigraphic Name
10 N	Gallatin County, Montana, USA	Dunbar Creek
South Side of Dry Hollow	Broadwater County, Montana, USA	Dunbar Creek

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Hypisodus minimus species	7	Animalia : Chordata : Mammalia : Artiodactyla : Hypisodontidae : Hypisodus : *Hypisodus minimus*	37.2 - 33.9 Ma Paleogene
Leptomeryx evansi species	7	Animalia : Chordata : Mammalia : Artiodactyla : Leptomerycidae : Leptomeryx : *Leptomeryx evansi*	37.2 - 33.9 Ma Paleogene
Leptomeryx speciosus species	7	Animalia : Chordata : Mammalia : Artiodactyla : Leptomerycidae : Leptomeryx : *Leptomeryx speciosus*	37.2 - 33.9 Ma Paleogene
Canis gregarius species	7	Animalia : Chordata : Mammalia : Carnivora : Canidae : Hesperocyon : *Canis gregarius*	37.2 - 33.9 Ma Paleogene
Chadrolagus sp. genus	6	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : *Chadrolagus*	37.2 - 33.9 Ma Paleogene
Megalagus brachyodon species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Megalagus : *Megalagus brachyodon*	37.2 - 33.9 Ma Paleogene
Palaeolagus temnodon species	7	Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Palaeolagus : *Palaeolagus temnodon*	37.2 - 33.9 Ma Paleogene
Centetodon kuenzii species	7	Animalia : Chordata : Mammalia : Geolabididae : Centetodon : *Centetodon kuenzii*	37.2 - 33.9 Ma Paleogene
Copedelphys titanelix species	7	Animalia : Chordata : Mammalia : Marsupialia : Herpetotheriidae : Copedelphys : *Copedelphys titanelix*	37.2 - 33.9 Ma Paleogene
Didelphys valens species	7	Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Herpetotherium : *Didelphys valens*	37.2 - 33.9 Ma Paleogene
Apternodus mediaevus species	7	Animalia : Chordata : Mammalia : Apternodontidae : Apternodus : *Apternodus mediaevus*	37.2 - 33.9 Ma Paleogene
Domnina thompsoni species	7	Animalia : Chordata : Mammalia : Soricomorpha : Soricidae : Domnina : *Domnina thompsoni*	37.2 - 33.9 Ma Paleogene
Leptictis sp. genus	6	Animalia : Chordata : Mammalia : Pilosa : Leptictidae : *Leptictis*	37.2 - 33.9 Ma Paleogene
Micropternodus borealis species	7	Animalia : Chordata : Mammalia : Micropternodontidae : Micropternodus : *Micropternodus borealis*	37.2 - 33.9 Ma Paleogene
Mesohippus sp. genus	6	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : *Mesohippus*	37.2 - 33.9 Ma Paleogene
Hyracodon sp. genus	6	Animalia : Chordata : Mammalia : Perissodactyla : Hyracodontidae : *Hyracodon*	37.2 - 33.9 Ma Paleogene
Ansomys nexodens species	7	Animalia : Chordata : Mammalia : Rodentia : Aplodontidae : Ansomys : *Ansomys nexodens*	33.9 - 33.3 Ma Oligocene
Brachygaulus xerobothrus species	7	Animalia : Chordata : Mammalia : Rodentia : Aplodontiidae : Brachygaulus : *Brachygaulus xerobothrus*	33.9 - 33.3 Ma Oligocene
Paradjidaumo trilophus species	7	Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Paradjidaumo : *Paradjidaumo trilophus*	37.2 - 33.9 Ma Paleogene
Pipestoneomys bisulcatus species	7	Animalia : Chordata : Mammalia : Rodentia : Parapedetidae : Pipestoneomys : *Pipestoneomys bisulcatus*	37.2 - 33.9 Ma Paleogene

References

Tabrum A. R., Nichols R., et al (2001) Tertiary paleontology of southwest Montana and adjacent Idaho, Museum of the Rockies Occasional Paper 3, 93-112

Hopkins S. B. (2004) Phylogeny and biogeography of the genus Ansomys Qiu, 1987 (Mammalia: Rodentia: Aplodontidae) and description of a new species from the Barstovian (mid-Miocene) of Montana, Journal of Paleontology 78 4, 731-740

Korth W. W., Tabrum A. R. (2011) A new aplodontoid rodent (Mammalia) from the early Oligocene (Orellan) of Montana and a suggested origin for the family Mylagaulidae, Annals of Carnegie Museum 80 1, 67-81

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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