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Latest Eocene Vertebrates from Northwestern South Dakota

Philip R. Bjork
Journal of Paleontology
Vol. 41, No. 1 (Jan., 1967), pp. 227-236
Stable URL: http://www.jstor.org/stable/1301919
Page Count: 12
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Abstract

A small collection of fossil vertebrates from the Slim Buttes Formation in Harding County, South Dakota, includes: Lepisosteus sp., Graptemys? sp., a trionychid turtle, Allognathosuchus sp. cf. A. riggsi, Epihippus intermedius, Teleodus thyboi n. sp., Colodon? cingulatus, Amynodontopsis bodei, an agriochoerid, and a leptotraguline. This assemblage is designated the Antelope Creek local fauna and is latest Eocene, Duchesnean, in age. Associated remains of Lepisosteus, the turtles, Allognathosuchus, and Amynodontopsis indicates that a permanently flowing stream was the environment of deposition.

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