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1 March 2012 New Micromomyid Plesiadapiforms (Mammalia, Euarchonta) from the Late Paleocene of Big Multi Quarry, Washakie Basin, Wyoming
Stephen G. B. Chester, K. Christopher Beard
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Abstract

The family Micromomyidae includes diminutive plesiadapiforms characterized by highly specialized premolars and relatively primitive molars. Perhaps as a result of their small size, micromomyids show a spotty distribution through space and time, with documented records ranging from the middle Tiffanian of Alberta to the early Wasatchian of Wyoming. The micromomyids of Big Multi Quarry, an early Clarkforkian site in southwestern Wyoming that has yielded the most diverse plesiadapiform fauna known to date, are described here. Dryomomys dulcifer, new species, is the oldest and most primitive species of this rare micromomyid genus currently known. Tinimomys tribos, new species, retains primitive dental features that have been modified in Tinimomys graybulliensis Szalay, 1974. The apparent sympatry shown by Dryomomys and Tinimomys at Big Multi Quarry suggests that these closely related micromomyids occupied distinct ecological niches, although the nature of any such distinctions remains unknown.

Stephen G. B. Chester and K. Christopher Beard "New Micromomyid Plesiadapiforms (Mammalia, Euarchonta) from the Late Paleocene of Big Multi Quarry, Washakie Basin, Wyoming," Annals of Carnegie Museum 80(2), 159-172, (1 March 2012). https://doi.org/10.2992/007.080.0204
Published: 1 March 2012
JOURNAL ARTICLE
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KEYWORDS
Clarkforkian
Dryomomys
sympatry
Tinimomys
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