UNSM Sx-25 (Lower Orella) (Oligocene of the United States)

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: lower Orella Member (Brule Formation), Orellan (33.9 - 33.3 Ma)

Environment/lithology: terrestrial

Reposited in the UNSM

Primary reference: J. A. Howe. 1966. The Oligocene Rodent Ischyromys in Nebraska. Journal of Paleontology 40(5):1200-1210 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17271: authorized by John Alroy, entered by John Alroy on 05.08.1996

Creative Commons license: CC BY (attribution)

Taxonomic list

• entire fauna could be from Orella A
Mammalia
 Carnivora - Amphicyonidae
Paradaphoenus minimus3 Hough 1948 bear-dog
"Orella Member": said to be Orella A by Hunt 2001
 Carnivora - Canidae
Hesperocyon gregarius7 Cope 1873 canid
Orella A
 Artiodactyla - Merycoidodontidae
Miniochoerus gracilis5 Leidy 1851 oreodont
Miniochoerus affinis5 Leidy 1869 oreodont
includes their "Platyochoerus platycephalus"
"Merycoidodon culbertsoni" = Merycoidodon culbertsonii6 Leidy 1848 oreodont
includes their "Genetochoerus periculorum"
 Artiodactyla - Leptochoeridae
Stibarus obtusilobus2 Cope 1873 even-toed ungulate
Orella A
Leptochoerus emilyae2 Edwards 1976 even-toed ungulate
Orella A
Leptochoerus elegans2 Macdonald 1955 even-toed ungulate
Orella A or B
 Lagomorpha - Leporidae
Megalagus turgidus4 Cope 1873 rabbit
Orella A
Palaeolagus hemirhizis4 Korth and Hageman 1988 rabbit
Orella A
 Rodentia - Ischyromyidae
Ischyromys sp.1 Leidy 1856 rodent