PBDB Collection

Fence Pocket (Eocene of the United States)

Also known as MV 6103

Where: Jefferson County, Montana (46.0° N, 112.0° W: paleocoordinates 47.8° N, 103.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Climbing Arrow Member (Renova Formation), Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: A. R. Tabrum, D. R. Prothero, and D. Garcia. 1996. Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 278-311 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 16959: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• 0.5 mi SE of Main Pocket; apparently same horizon
"? Hyracodon sp." is omitted by Tabrum et al. 2001

Show authors, comments, and common names

Mammalia
Tribosphenida - Herpetotheriidae	Copedelphys titanelix, Herpetotherium valens, Herpetotherium fugax Copedelphys titanelix Matthew 1903 marsupial Herpetotherium valens Lambe 1908 marsupial Herpetotherium fugax Cope 1873 marsupial
Carnivora - Canidae	Hesperocyon gregarius Hesperocyon gregarius Cope 1873 canid
Artiodactyla - Protoceratidae	Trigenicus profectus¹ Trigenicus profectus¹ Matthew 1903 protoceratid
Artiodactyla - Leptomerycidae	Pipestoneia douglassi², "Leptomeryx" speciosus, "Leptomeryx" mammifer Pipestoneia douglassi² Tabrum and Métais 2007 ruminant additional "Leptomeryx," said to be "new species I" "Leptomeryx" speciosus Lambe 1908 ruminant "Leptomeryx" mammifer Cope 1885 ruminant
Artiodactyla - Leptochoeridae	Stibarus montanus³ Stibarus montanus³ Matthew 1903 even-toed ungulate
Artiodactyla - Merycoidodontidae	Merycoidodontidae indet., Bathygenys alpha Merycoidodontidae indet. Cook 1912 oreodont "Merycoidodon" originally described as "M. forsythae" by Schultz and Falkenbach 1968, which has been transferred to Miniochoerus; however, material has not been re-examined according to Stevens and Stevens 1996 Bathygenys alpha Douglass 1902 oreodont
Perissodactyla - Equidae	Miohippus grandis Miohippus grandis Clark and Beerbower 1967 anchitheriine horse
Soricomorpha - Geolabididae	Centetodon kuenzii Centetodon kuenzii Lillegraven et al. 1981 placental
Soricomorpha - Apternodontidae	Apternodus mediaevus Apternodus mediaevus Matthew 1903 placental
Soricomorpha - Micropternodontidae	Micropternodus borealis Micropternodus borealis Matthew 1903 placental
Soricomorpha - Oligoryctidae	Oligoryctes altitalonidus Oligoryctes altitalonidus Clark 1936 placental
Soricomorpha - Soricidae	Domnina thompsoni Domnina thompsoni Simpson 1941 shrew
Lagomorpha - Leporidae	Megalagus brachyodon, Palaeolagus temnodon, Chadrolagus emryi³ Megalagus brachyodon Matthew 1903 rabbit Palaeolagus temnodon Douglass 1902 rabbit Chadrolagus emryi³ Gawne 1978 rabbit
Rodentia - Cylindrodontidae	Cylindrodon fontis Cylindrodon fontis Douglass 1902 rodent
Rodentia - Ischyromyidae	Ischyromys sp., Ischyromys veterior Ischyromys sp. Leidy 1856 rodent said to be new Ischyromys veterior Matthew 1903 rodent
Rodentia - Eomyidae	Namatomys lloydi, "Paradjidaumo trilophus" = Adjidaumo trilophus Namatomys lloydi Black 1965 rodent "Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent
Rodentia - Eutypomyidae	Eutypomys parvus Eutypomys parvus Lambe 1908 rodent mentioned in text but apparently accidentally shown in table to be from the Main Pocket

¹Alroy 2002; ²Tabrum and Métais 2007; ³Tabrum et al. 2001