Cottonwood Creek (Lower Bridger) (Eocene of the United States)
Where: Uinta County, Wyoming (41.2° N, 110.5° W: paleocoordinates 45.2° N, 96.8° W)
• coordinate based on political unit
When: lower Member (Bridger Formation), Bridgerian (50.3 - 46.2 Ma)
Environment/lithology: terrestrial
Primary reference: C. L. Gazin. 1976. Mammalian Faunal Zones of the Bridger Middle Eocene. Smithsonian Contributions to Paleobiology 26:1-25 [J. Alroy/J. Alroy/J. Marcot]more details
PaleoDB collection 16205: authorized by John Alroy, entered by John Alroy on 26.03.1995
Creative Commons license: CC BY (attribution)
Taxonomic list
• "Bridger C is exposed along the upper course": Wood 1934
"Viverravus gracilis" Thorpe 1923a: level not stated
AMNH 19231 from B3 is either "Eotrigonias petersoni" or Hyrachyus: Wood 1927
"Viverravus gracilis" Thorpe 1923a: level not stated
AMNH 19231 from B3 is either "Eotrigonias petersoni" or Hyrachyus: Wood 1927
Show authors, comments, and common names
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Mesonyx obtusidens n. sp.
Mesonyx obtusidens n. sp. Cope 1872 condylarth said to be from "lower Bridger... 5 miles south of Granger" by Thorpe 1923a
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"Hyrachyus affinis" = Hyrachyus modestus8 Leidy 1870 odd-toed ungulate Bridger B3; may include Cope's "Hyrachyus implicatus"
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Antiacodon pygmaeus n. sp.
Antiacodon pygmaeus n. sp. Cope 1872 even-toed ungulate | |
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Metacheiromys marshi7 Wortman 1903 placental Bridger B3 "Middle Cottonwood Creek" and Bridger B2 or B3, "Lower Cottonwood Creek"
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Pseudotomus hians n. sp.
Pseudotomus hians n. sp. Cope 1872 rodent "probably B" according to Wood 1962; includes type of "Ischyrotomus superbus"
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Smilodectes gracilis6, "Notharctus tenebrosus" = Notharctus tenebrosus6, "Notharctus pugnax" = Notharctus tenebrosus
"Notharctus tenebrosus" = Notharctus tenebrosus6 Leidy 1870 primate Bridger B; may include B4 specimen of Granger and Gregory 1917
"Notharctus pugnax" = Notharctus tenebrosus Leidy 1870 primate second, much larger group of specimens in chart of Robinson 1957; see also Gingerich 1979a
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