Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.6° N, 95.7° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Orella Member (Brule Formation), Orellan (33.9 - 33.3 Ma)
Environment/lithology: terrestrial
Primary reference: J. A. Lillegraven, M. C. McKenna, and L. Kristalka. 1981. Evolutionary relationships of middle Eocene and younger species of Centetodon (Mammalia, Insectivora, Geolabididae) with a description of the dentition of Ankylodon (Adapisoricidae). University of Wyoming Publication 45:1-115 [J. Alroy/J. Alroy/M. Uhen]more details
PaleoDB collection 17159: authorized by John Alroy, entered by John Alroy on 15.05.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
divided into four levels by three "banded layers": Wang 1994; Prothero 1996c explains that this cannot be equated to the UNSM A/B/C/D scheme because the lithostratigraphy is too different
Mammalia | |
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Hesperocyon gregarius4 Cope 1873 canid from second, third, and fourth levels; also present at "west end"; said by Wang to probably include UNSM specimen from Munson Ranch "7-8 mi north of Harrison"
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Centetodon marginalis Cope 1873 placental between lower and middle banded layers, i.e., second level
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"Paradjidaumo cf. trilophus" = Adjidaumo trilophus3
"Paradjidaumo cf. trilophus" = Adjidaumo trilophus3 Cope 1873 rodent Plunkett Locality, Parsons Ranch
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