Flagstaff Rim IV (Eocene of the United States)

Also known as Al's Pocket; Jenny's Pocket; Middle Fork of Lone Tree Gulch

Where: Natrona County, Wyoming (43.2° N, 107.1° W: paleocoordinates 44.8° N, 98.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: White River Formation, Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: R. J. Emry. 1992. Mammalian Range Zones in the Chadronian White River Formation at Flagstaff Rim, Wyoming. In D. R. Prothero, W. A. Berggren (eds.), Eocene-Oligocene Climatic and Biotic Evolution 106-115 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 16963: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Chris Bell and Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• Al's Pocket and Jenny's Pocket are from 16 m below Ash F: Korth and Emry 1997b
86-114 m, Ash D - Ash F
unclassified
  -
"Novacek leptictid" acutidens6
pers. commun. 16.2.00: "Frictops emryi"
Reptilia
 Squamata - Anguidae
Helodermoides tuberculatus9 Douglass 1903 squamates
AMNH Frick collection no. 8697, incomplete parietal; 8698, incomplete parietal
 Squamata - Rhineuridae
Spathorhynchus natronicus2 Berman 1977 worm lizard
Paratype specimen (AMNH 8678) from "NE 1/4 sec. 27, T31N, R83W, Middle Fork of Lone Tree Gulch, Natrona Co., Wyoming, White River Formation, 20 ft. below Ash F, Early Oligocene (Chadronian)." (p. 987)
Mammalia
 Rodentia -
Nonomys simplicidens Emry and Dawson 1972 rodent
 Rodentia - Aplodontidae
Prosciurus vetustus Matthew 1903 mountain beaver
 Rodentia - Sciuridae
Douglassciurus jeffersoni1 Douglass 1902 squirrel
 Rodentia - Eomyidae
Namatomys lloydi Black 1965 rodent
this is the "true" Namatomys"
Paradjidaumo sp. Burke 1934 rodent
Adjidaumo minimus Matthew 1903 rodent
Aulolithomys vexilliames n. sp.4 Korth and Emry 1997 rodent
from Jenny's Pocket; "A. sp."
 Rodentia - Heliscomyidae
Heliscomys ostranderi5 Korth et al. 1991 rodent
 Rodentia - Ischyromyidae
"Titanotheriomys veterior" = Ischyromys veterior
"Titanotheriomys veterior" = Ischyromys veterior Matthew 1903 rodent
 Rodentia - Cylindrodontidae
Cylindrodon natronensis3 Emry and Korth 1996 rodent
Cylindrodon solarborus3 Emry and Korth 1996 rodent
 Lagomorpha - Leporidae
Chadrolagus emryi Gawne 1978 rabbit
Palaeolagus temnodon Douglass 1902 rabbit
Megalagus brachyodon Matthew 1903 rabbit
 Lipotyphla - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981 placental
Al's Pocket and Jenny's Pocket: Asher et al. 2005
 Perissodactyla - Brontotheriidae
Brontotheriidae indet. Marsh 1873 brontothere
 Perissodactyla - Hyracodontidae
Hyracodon cf. priscidens Lambe 1905 odd-toed ungulate
 Perissodactyla - Rhinocerotidae
? Subhyracodon sp. Wood 1927 rhinoceros
? Trigonias sp. Lucas 1900 rhinoceros
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Tribosphenida - Apternodontidae
"Apternodus altitalonidus" = Oligoryctes altitalonidus Clark 1936 placental
Oligoryctes cameronensis Hough 1956 placental
Apternodus brevirostris Schlaikjer 1934 placental
Apternodus gregoryi Schlaikjer 1933 placental
 Chiroptera -
Chiroptera indet. Blumenbach 1779 bat
a bat
 Carnivora - Ursidae
Parictis sp. Scott 1893 bear
assigned to "Subparictis" by Baskin and Tedford 1996
 Carnivora - Amphicyonidae
Brachyrhynchocyon sp.1 Scott and Jepsen 1936 bear-dog
Daphoenictis sp. Hunt 1974 bear-dog
discussed by Hunt 1996 and said to be 10' above Ash E
 Carnivora - Canidae
Hesperocyon gregarius1 Cope 1873 canid
 Carnivora - Nimravidae
Dinictis sp., "Hoplophoneus mentalis" = Hoplophoneus primaevus1
Dinictis sp. Leidy 1854 false sabre-tooth
"Hoplophoneus mentalis" = Hoplophoneus primaevus1 Leidy and Owen 1851 false sabre-tooth
 Pholidota - Patriomanidae
"Patriomanis americanus" = Patriomanis americana
"Patriomanis americanus" = Patriomanis americana Emry 1970 pangolin
 Ferae - Epoicotheriidae
Epoicotherium cf. unicum Douglass 1905 placental
 Macroscelidea - Amphilemuridae
Ankylodon sp. Patterson and McGrew 1937 elephant shrew
 Ungulata - Merycoidodontidae
Bathygenys hedlundae8, "Merycoidodon forsythae n. sp." = Miniochoerus forsythae
Bathygenys hedlundae8 Schultz and Falkenbach 1968 oreodont
"Merycoidodon forsythae n. sp." = Miniochoerus forsythae Schultz and Falkenbach 1968 oreodont
 Ungulata - Leptochoeridae
Stibarus sp. Cope 1873 even-toed ungulate
 Ungulata - Entelodontidae
Archaeotherium cf. coarctatum Cope 1889 even-toed ungulate
 Ungulata - Camelidae
Poebrotherium eximium7 Hay 1902 camel
 Ungulata - Oromerycidae
Eotylopus reedi Matthew 1910 even-toed ungulate
 Ungulata - Protoceratidae
"Leptotragulus profectus" = Trigenicus profectus Matthew 1903 protoceratid
Pseudoprotoceras longinaris Cook 1934 protoceratid
 Ungulata - Hypisodontidae
Hypisodus sp. Cope 1873 ruminant
 Ungulata - Leptomerycidae
Leptomeryx mammifer Cope 1885 ruminant
Leptomeryx speciosus Lambe 1908 ruminant
 Hyaenodonta - Hyaenodontidae
Hyaenodon montanus Douglass 1902 eutherian
Hyaenodon megaloides Mellett 1977 eutherian
Hyaenodon mustelinus Scott 1894 eutherian
 Didelphimorphia - Didelphidae
Didelphidae indet.1 Gray 1821 opossum