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1 June 2005 THE PLIOCENE AND PLEISTOCENE HISTORY OF COTTON RATS IN THE MEADE BASIN OF SOUTHWESTERN KANSAS
Pablo Peláez-Campomanes, Robert A. Martin
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Abstract

The taxonomy and dental evolution of cotton rats, genus Sigmodon, from Pliocene and Pleistocene deposits in the Meade Basin of southwestern Kansas are examined. Prosigmodon is here subsumed under Sigmodon. Morphological and multivariate statistical analyses identify 3 Sigmodon lineages and 5 immigration events in the Meade Basin. The 1st immigration event occurred during the early Blancan and the latest during the Holocene. The analyses of dental characters indicate directional trends in almost all features, representing both size and shape. A comparison of information from the cotton rat fossil record with a recent molecular phylogeny suggests the molecular phylogeny has set the origin of modern cotton rat groups too early. North American species groups probably do not predate the late Pliocene.

Pablo Peláez-Campomanes and Robert A. Martin "THE PLIOCENE AND PLEISTOCENE HISTORY OF COTTON RATS IN THE MEADE BASIN OF SOUTHWESTERN KANSAS," Journal of Mammalogy 86(3), 475-494, (1 June 2005). https://doi.org/10.1644/1545-1542(2005)86[475:TPAPHO]2.0.CO;2
Accepted: 21 September 2004; Published: 1 June 2005
JOURNAL ARTICLE
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