Also known as South Fork of Lone Tree Gulch
Where: Natrona County, Wyoming (43.2° N, 107.1° W)
• Paleocoordinates: 49.3° N, 90.2° W (Wright 2013)
• 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: CC0 (CC0)
Taxonomic list
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| Mammalia | |
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Hyaenodon montanus Douglass 1902 creodont | |
"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
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Dinictis sp. Leidy 1854 false sabre-tooth
Hoplophoneus oharrai Jepsen 1926 false sabre-tooth | |
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Epoicotherium cf. unicum Douglass 1905 placental | |
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Pseudoprotoceras longinaris Cook 1934 protoceratid | |
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Hypisodus sp. Cope 1873 ruminant | |
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Leptomeryx mammifer Cope 1885 ruminant
Leptomeryx speciosus Lambe 1908 ruminant | |
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"Merycoidodon forsythae" = Miniochoerus forsythae Schultz and Falkenbach 1968 oreodont | |
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Eotylopus reedi Matthew 1910 even-toed ungulate | |
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Archaeotherium cf. coarctatum Cope 1889 even-toed ungulate | |
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Brontotheriidae indet. Marsh 1873 brontothere | |
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Hyracodon cf. priscidens Lambe 1905 odd-toed ungulate | |
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? Trigonias sp. Lucas 1900 rhinoceros | |
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Apternodus gregoryi Schlaikjer 1933 placental
Apternodus brevirostris Schlaikjer 1934 placental | |
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Centetodon chadronensis Lillegraven et al. 1981 placental | |
Cylindrodon solarborus n. sp.3
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Agnotocastor galushai n. sp.
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"Titanotheriomys veterior" = Ischyromys veterior
"Titanotheriomys veterior" = Ischyromys veterior Matthew 1903 rodent | |
"? Protosciurus jeffersoni" = Douglassciurus jeffersoni
"? Protosciurus jeffersoni" = Douglassciurus jeffersoni Douglass 1902 squirrel | |
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Meliakrouniomys skinneri Emry 1972 rodent | |
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Palaeolagus temnodon Douglass 1902 rabbit
Megalagus brachyodon Matthew 1903 rabbit
Chadrolagus emryi Gawne 1978 rabbit | |
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Ankylodon sp. Patterson and McGrew 1937 elephant shrew | |
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| Reptilia | |
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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
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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)
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