10 N (Eocene of the United States)

Also known as MV 8007 (10N no. 2)

Where: Gallatin County, Montana (45.7° N, 111.0° W)

• Paleocoordinates: 52.3° N, 93.8° W (Wright 2013)

• coordinate based on political unit

• local area-level geographic resolution

When: Dunbar Creek Formation, Late/Upper Chadronian (37.0 - 33.9 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; siltstone

• formation is "thick bedded white to grayish-yellow tuffaceous siltstone"

Size class: macrofossils

Primary reference: A. R. Tabrum, R. Nichols, and A. D. Barnosky. 2001. Tertiary paleontology of southwest Montana and adjacent Idaho. Museum of the Rockies Occasional Paper 3:93-112 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 17027: authorized by John Alroy, entered by John Alroy on 21.09.1999

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Lagomorpha - Leporidae
Megalagus brachyodon, Palaeolagus cf. temnodon, ? Chadrolagus sp.
Megalagus brachyodon Matthew 1903 rabbit
Palaeolagus cf. temnodon Douglass 1902 rabbit
? Chadrolagus sp. Gawne 1978 rabbit
 Rodentia - Pipestoneomyidae
Pipestoneomys bisulcatus
Pipestoneomys bisulcatus Donohoe 1956 rodent
 Rodentia - Eomyidae
"Paradjidaumo trilophus" = Adjidaumo trilophus
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent
 Perissodactyla - Hyracodontidae
Hyracodon sp.
Hyracodon sp. Leidy 1856 odd-toed ungulate
 Perissodactyla - Equidae
Mesohippus sp.
Mesohippus sp. Marsh 1875 anchitheriine horse
 Artiodactyla - Leptomerycidae
Leptomeryx evansi, "Leptomeryx" speciosus
Leptomeryx evansi Leidy 1853 ruminant
"Leptomeryx" speciosus Lambe 1908 ruminant
 Artiodactyla - Hypisodontidae
Hypisodus minimus
Hypisodus minimus Cope 1873 ruminant
 Carnivora - Canidae
Hesperocyon gregarius
Hesperocyon gregarius Cope 1873 canid
 Soricomorpha - Geolabididae
Centetodon kuenzii
Centetodon kuenzii Lillegraven et al. 1981 placental
 Soricomorpha - Apternodontidae
Apternodus mediaevus
Apternodus mediaevus Matthew 1903 placental
from MV 8007: Asher et al. 2002
 Soricomorpha - Micropternodontidae
Micropternodus borealis
Micropternodus borealis Matthew 1903 placental
 Soricomorpha - Soricidae
Domnina thompsoni
Domnina thompsoni Simpson 1941 shrew
 Leptictida - Leptictidae
Leptictis sp.
Leptictis sp. Leidy 1868 eutherian
 Tribosphenida - Herpetotheriidae
Copedelphys titanelix, Herpetotherium valens
Copedelphys titanelix Matthew 1903 marsupial
Herpetotherium valens Lambe 1908 marsupial