Dirty Creek Ridge (Eocene of the United States)
Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.8° N, 95.1° W)
• coordinate based on political unit
When: Peanut Peak Member (Chadron Formation), Chadronian (37.2 - 33.9 Ma)
• member assignment based on LaGarry pers. commun. 19 May 2005
Environment/lithology: terrestrial
Primary reference: G. E. Ostrander. 1985. Correlation of the early Oligocene (Chadronian) in northwestern Nebraska. Dakoterra 2(2):205-231 [J. Alroy/J. Alroy/P. Holroyd]more details
PaleoDB collection 16941: authorized by John Alroy, entered by John Alroy on 18.02.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
• SE 1/4 sec 23 T33N R53W
Show authors, comments, and common names
| Mammalia | |
"Peratherium fugax" = Herpetotherium fugax
"Peratherium fugax" = Herpetotherium fugax Cope 1873 marsupial | |
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Brontotheriidae indet. Marsh 1873 brontothere | |
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Pseudoprotoceras longinaris Cook 1934 protoceratid
Heteromeryx dispar3 Matthew 1905 protoceratid FMNH specimen from Henry Morgan Quarry, NE 1/4 sec 23 T33N R53W Sioux Co., i.e., different part of same section as Dirty Creek Ridge
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? Parvitragulus sp. Emry 1978 ruminant | |
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Hypisodus minimus Cope 1873 ruminant | |
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Leptomeryx sp. Leidy 1853 ruminant | |
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Hesperocyon sp. Scott 1890 canid | |
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Oligoryctes cameronensis Hough 1956 placental | |
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Micropternodus borealis Matthew 1903 placental | |
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Domnina gradata Cope 1873 shrew | |
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Megalagus brachyodon Matthew 1903 rabbit
Palaeolagus temnodon Douglass 1902 rabbit | |
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Prosciurus vetustus Matthew 1903 mountain beaver | |
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Oligospermophilus douglassi2 Korth 1981 squirrel coordinate 1/2 mi N of Dirty Creek Ridge, 59' below top of Chadron (fauna is from 43' below top)
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Eomyidae indet., Aulolithomys bounites, Adjidaumo minimus, "Paradjidaumo trilophus" = Adjidaumo trilophus, Adjidaumo minutus
Eomyidae indet. Winge 1887 rodent
Aulolithomys bounites Black 1965 rodent
Adjidaumo minimus Matthew 1903 rodent
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent
Adjidaumo minutus Cope 1873 rodent | |
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Heliscomys vetus Cope 1873 rodent | |
| Reptilia | |
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Peltosaurus sp. Cope 1873 squamates | |
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Glyptosaurus sp. Marsh 1871 squamates | |