PBDB Collection

UNSM Sx-26 (Orella A) (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 17273: authorized by John Alroy, entered by John Alroy on 05.08.1996

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Carnivora - Amphicyonidae	Paradaphoenus minimus³ Paradaphoenus minimus³ Hough 1948 bear-dog Orella A
Carnivora - Canidae	Hesperocyon gregarius⁸ Hesperocyon gregarius⁸ Cope 1873 canid Orella A
Artiodactyla - Leptochoeridae	Stibarus obtusilobus² Stibarus obtusilobus² Cope 1873 even-toed ungulate Orella A
Lagomorpha - Leporidae	Megalagus turgidus⁷, Palaeolagus hemirhizis⁷ Megalagus turgidus⁷ Cope 1873 rabbit Orella A Palaeolagus hemirhizis⁷ Korth and Hageman 1988 rabbit Orella A
Rodentia - Aplodontidae	Prosciurus parvus⁶, Pelycomys cf. brulanus⁴, "Prosciurus relictus" = Altasciurus relictus⁶ Prosciurus parvus⁶ Korth 1989 mountain beaver Orella A; Orella A or B Pelycomys cf. brulanus⁴ Korth 1986 mountain beaver Orella A "Prosciurus relictus" = Altasciurus relictus⁶ Cope 1873 mountain beaver Orella A; Orella A or B
Rodentia - Heliscomyidae	Apletotomeus crassus⁵ Apletotomeus crassus⁵ Reeder 1960 rodent Orella A
Rodentia - Ischyromyidae	Ischyromys sp.¹ Ischyromys sp.¹ Leidy 1856 rodent

¹Alroy 2002; ²Edwards 1976; ³Hunt 2001; ⁴Korth 1986; ⁵Korth 1989; ⁶Korth 1989; ⁷Korth and Hageman 1988; ⁸Wang 1994