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
Mammalia
 Rodentia - Ischyromyidae
Ischyromys sp. Leidy 1856 rodent
said to be new
Ischyromys veterior Matthew 1903 rodent
 Rodentia - Eomyidae
"Paradjidaumo trilophus" = Adjidaumo trilophus, Namatomys lloydi
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent
Namatomys lloydi Black 1965 rodent
 Rodentia - Eutypomyidae
Eutypomys parvus Lambe 1908 rodent
mentioned in text but apparently accidentally shown in table to be from the Main Pocket
 Rodentia - Cylindrodontidae
Cylindrodon fontis Douglass 1902 rodent
 Lagomorpha - Leporidae
Chadrolagus emryi3 Gawne 1978 rabbit
Palaeolagus temnodon Douglass 1902 rabbit
Megalagus brachyodon Matthew 1903 rabbit
 Theriamorpha - Soricidae
Domnina thompsoni Simpson 1941 shrew
 Theriamorpha - Geolabididae
Centetodon kuenzii Lillegraven et al. 1981 placental
 Theriamorpha - Oligoryctidae
Oligoryctes altitalonidus Clark 1936 placental
 Theriamorpha - Micropternodontidae
Micropternodus borealis Matthew 1903 placental
 Theriamorpha - Apternodontidae
Apternodus mediaevus Matthew 1903 placental
 Perissodactyla - Equidae
Miohippus grandis Clark and Beerbower 1967 anchitheriine horse
 Artiodactyla - Leptochoeridae
Stibarus montanus3 Matthew 1903 even-toed ungulate
 Artiodactyla - Protoceratidae
Trigenicus profectus1 Matthew 1903 protoceratid
 Artiodactyla - Leptomerycidae
Pipestoneia douglassi2 Tabrum and Métais 2007 ruminant
additional "Leptomeryx," said to be "new species I"
"Leptomeryx" mammifer Cope 1885 ruminant
"Leptomeryx" speciosus Lambe 1908 ruminant
 Artiodactyla - Merycoidodontidae
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
 Carnivora - Canidae
Hesperocyon gregarius Cope 1873 canid
 Theriamorpha - Herpetotheriidae
Copedelphys titanelix Matthew 1903 marsupial
Herpetotherium valens Lambe 1908 marsupial
Herpetotherium fugax Cope 1873 marsupial