SCP103 (VOR).pdf (2.7 MB)

Rodents (Mammalia) from Fitterer Ranch, Brule Formation (Oligocene), North Dakota

Download (2.7 MB)
book
posted on 12.09.2019 by William W. Korth, Robert J. Emry, Clint A. Boyd, Jeff J. Person
Eighteen rodent species are recognized from the Fitterer Ranch fauna of North Dakota on the basis of more than a thousand collected specimens. Of the species recognized, four are new: the prosciurine aplodontiids Prosciurus hogansoni and Altasciurus leonardi, the heliscomyid Heliscomys borealis, and the cricetid Eumys lammersi.
A previously described castorid from this fauna, Oligotheriomys primus Korth, 1998, is considered a synonym of “Eutypomysmagnus Wood, 1937, on the basis of the recovery of lower dentitions but is retained in the genus Oligotheriomys. A single specimen is questionably referred to Microparamys, a genus elsewhere limited to the Eocene (Clarkforkian-Chadronian land mammal ages). The rodent fauna appears to be a combination of predominantly Orellan and Whitneyan species (early Oligocene), suggesting that the section might transcend the Orellan-Whitneyan boundary. However, the rodent fauna does not alter significantly from the lowest to the highest horizons.

History

Series

  • Smithsonian Contributions to Paleobiology

Volume Number

103

Publication date

11/03/2019

ISSN (print)

0081-0266

ISSN (online)

1943-6688

Funder(s)

Smithsonian Institution; National Museum of Natural History

Exports

Logo branding

Categories

Exports