PaleoDB taxon number: 333390
Full reference: W. W. Korth. 2007. A new species of Ansomys (Rodentia, Aplodontidae) from the late Oligocene (latest Whitney-earliest Arikareean) of South Dakota. Journal of Vertebrate Paleontology 27(3):740-743
Type specimen: CM 54080, a tooth (right M1 or M2). Its type locality is Harris Ranch Unit E Silt, which is in an Arikareean terrestrial horizon in South Dakota.
Ecology: scansorial insectivore