Flagstaff Rim V (Eocene of the United States)

Also known as South 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

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 16964: 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

• 114-134 m, Ash F - Ash G
unclassified
  -
"Novacek leptictid" acutidens4
pers. commun. 16.2.00: "Frictops emryi"
Mammalia
 Rodentia - Ischyromyidae
"Titanotheriomys veterior" = Ischyromys veterior
"Titanotheriomys veterior" = Ischyromys veterior Matthew 1903 rodent
 Rodentia - Sciuridae
"? Protosciurus jeffersoni" = Douglassciurus jeffersoni
"? Protosciurus jeffersoni" = Douglassciurus jeffersoni Douglass 1902 squirrel
 Rodentia - Castoridae
Agnotocastor galushai n. sp. Emry 1972 beaver
see Emry 1972
 Rodentia -
Meliakrouniomys skinneri Emry 1972 rodent
 Rodentia - Cylindrodontidae
Cylindrodon solarborus n. sp.3 Emry and Korth 1996 rodent
 Lagomorpha - Leporidae
Chadrolagus emryi Gawne 1978 rabbit
Palaeolagus temnodon Douglass 1902 rabbit
Megalagus brachyodon Matthew 1903 rabbit
 Theriamorpha - Geolabididae
Centetodon chadronensis Lillegraven et al. 1981 placental
 Theriamorpha - Apternodontidae
Apternodus gregoryi Schlaikjer 1933 placental
Apternodus brevirostris Schlaikjer 1934 placental
 Perissodactyla - Brontotheriidae
Brontotheriidae indet. Marsh 1873 brontothere
 Perissodactyla - Rhinocerotidae
? Trigonias sp. Lucas 1900 rhinoceros
 Perissodactyla - Hyracodontidae
Hyracodon cf. priscidens Lambe 1905 odd-toed ungulate
 Perissodactyla - Equidae
Equidae indet.1 Gray 1821 horse
 Artiodactyla - Camelidae
Poebrotherium wilsoni5 Leidy 1847 camel
 Artiodactyla - Entelodontidae
Archaeotherium cf. coarctatum Cope 1889 even-toed ungulate
 Artiodactyla - Oromerycidae
Eotylopus reedi Matthew 1910 even-toed ungulate
 Artiodactyla - Protoceratidae
Pseudoprotoceras longinaris Cook 1934 protoceratid
 Artiodactyla - Hypisodontidae
Hypisodus sp. Cope 1873 ruminant
 Artiodactyla - Leptomerycidae
Leptomeryx mammifer Cope 1885 ruminant
Leptomeryx speciosus Lambe 1908 ruminant
 Artiodactyla - Merycoidodontidae
"Merycoidodon forsythae" = Miniochoerus forsythae Schultz and Falkenbach 1968 oreodont
Bathygenys alpha6 Douglass 1902 oreodont
Bathygenys hedlundae1 Schultz and Falkenbach 1968 oreodont
 Creodonta - Hyaenodontidae
Hyaenodon montanus Douglass 1902 creodont
 Carnivora - Nimravidae
Dinictis sp. Leidy 1854 false sabre-tooth
Hoplophoneus oharrai Jepsen 1926 false sabre-tooth
 Carnivora - Amphicyonidae
Brachyrhynchocyon sp.1 Scott and Jepsen 1936 bear-dog
 Carnivora - Ursidae
Parictis sp. Scott 1893 bear
assigned to "Subparictis" by Baskin and Tedford 1996
 Carnivora - Canidae
"Hesperocyon paterculus" = Hesperocyon gregarius
"Hesperocyon paterculus" = Hesperocyon gregarius Cope 1873 canid
specimens listed by Wang 1994 from 10 ft above Ash F and 30 and 35 ft below Ash G
 Theriamorpha - Epoicotheriidae
Epoicotherium cf. unicum Douglass 1905 placental
 Macroscelidea - Amphilemuridae
Ankylodon sp. Patterson and McGrew 1937 elephant shrew
 Theriamorpha - Didelphidae
Reptilia
 Squamata - Rhineuridae
Spathorhynchus natronicus2 Berman 1977 worm lizard
Holotype from "South Fork of Lone Tree Guclh of the Flagstaff Rim area, SE1/4 sec. 27, T31N, R83W, Natrona Co., Wyoming, White River Formation, 30 ft. below Ash G. (see Emry, 1973, for detailed stratigraphic and locality data). Chadronian, Early Oligocene" (p.987)
 Squamata - Anguidae
Helodermoides tuberculatus7 Douglass 1903 squamates
AMNH Frick collection no. 8706, incomplete skull, jaws, and anterior trunk region with osteoderms
cf. Helodermoides tuberculatus7 Douglass 1903 squamates
AMNH Frick collection no. 8696, body osteoderms