New material and evaluation of the chronostratigraphic position of Daphoenictis tedfordi (Mammalia, Carnivora, Amphicyonidae), a cat-like carnivoran from the latest Eocene of northwestern Nebraska, USA

Citation

Description

This dataset contains the digitized treatments in Plazi based on the original journal article Boardman, GS, Hunt, RM Jr. (2015): New material and evaluation of the chronostratigraphic position of Daphoenictis tedfordi (Mammalia, Carnivora, Amphicyonidae), a cat-like carnivoran from the latest Eocene of northwestern Nebraska, USA. Palaeontologia Electronica (Hagerstown, Md.) 8 (5): 1-10, DOI: 10.26879/508, URL: http://dx.doi.org/10.26879/508

ABSTRACT

One of the most enigmatic amphicyonid carnivorans, the cat-like Daphoenictis tedfordi, is now known from 12 cranio-dental specimens from North America. The most recently recovered specimen, a partial right hemimandible (UNSM 27015) described herein, adds considerably to our knowledge of this taxon, and in completeness rivals the holotype of the species. Daphoenictis tedfordi is distributed from Saskatchewan to

Montana, continuing to Nebraska, Colorado, and Wyoming, with nearly 50% of the specimens coming from northwest Nebraska. The chronostratigraphy and geographic locus of the Nebraska hypodigm is the focus of this report. UNSM 27015 links the fragmentary fossils of the Nebraska hypodigm to the holotype (Cypress Hills, Saskatchewan). Chronologic evidence indicates this species is restricted to the Chadronian (late

Eocene) age. Recent astronomical calibration applied to late Eocene-Oligocene tuffs places the species entirely in the middle Chadronian with a single individual found in the late early Chadronian biochron.

Grant S. Boardman. Department of Physics, Astronomy and Geology, Berry College, Mount Berry, Georgia 30149, USA, gboardman@berry.edu

Robert M. Hunt, Jr. Department of Earth and Atmospheric Sciences, University of Nebraska, Lincoln, Nebraska 68588, USA, rhunt2@unl.edu

Keywords: Carnivora; Amphicyonid; late Eocene; Chadronian; geochronology; Great Plains (Nebraska)

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