Sciurus olsoni type locality (Miocene of the United States)

Where: Lyon County, Nevada (39.6° N, 119.1° W: paleocoordinates 40.2° N, 116.7° W)

• coordinate stated in text

• hand sample-level geographic resolution

When: Truckee Formation, Clarendonian (12.5 - 9.4 Ma)

• "middle member of the Truckee Formation"

•assigned to the Clarendonian based on "a K/Ar date of 9.81" m.y. on an "approximately equivalent" aged tuff "in a diatomite mine about 2.5 km south"

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; tuffaceous diatomite

• "the bottom water was anoxic and not subject to seasonal overturn... deposits were far from shore"
• "The middle member... is composed principally of finely laminated (varved) diatomite with occasional tuffs... Uninterrupted lamination... very infrequent bioturbation, and excellent preservation"

Size class: macrofossils

Preservation: adpression

Reposited in the UMMP

Collection methods: surface (float),

• "the specimen was collected in loose rubble"

Primary reference: R. J. Emry, W. W. Korth, and M. A. Bell. 2005. A tree squirrel (Rodentia, Sciuridae, Sciurini) from the late Miocene (Clarendonian) of Nevada. Journal of Vertebrate Paleontology 25(1):228-235 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 71406: authorized by John Alroy, entered by John Alroy on 24.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Rodentia - Sciuridae
Sciurus olsoni n. sp.
Sciurus olsoni n. sp. Emry et al. 2005 squirrel