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A New Species of Palaeosinopa (Insectivora: Pantolestidae) from the Late Paleocene of Western North America

Philip D. Gingerich
Journal of Mammalogy
Vol. 61, No. 3 (Aug., 1980), pp. 449-454
DOI: 10.2307/1379838
Stable URL: http://www.jstor.org/stable/1379838
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A New Species of Palaeosinopa (Insectivora: Pantolestidae) from the Late Paleocene of Western North America
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Abstract

A new species of Palaeosinopa is described from the late Tiffanian Dell Creek Quarry in the Hoback Basin of western Wyoming. This is the oldest record of the genus Palaeosinopa. Palaeosinopa simpsoni Van Valen from the early Tiffanian is synonymized with Paleotomus senior (Simpson), and this taxon is regarded as a pantolestid as originally described, not a palaeoryctid as more recently proposed. Paleotomus is plausibly the ancestor of the middle and late Tiffanian pantolestid Niphredil, and it may be the ancestor of late Tiffanian, Clarkforkian, and Wasatchian Palaeosinopa as well.

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