Middle Pleistocene (Irvingtonian) <i>Ochotona</i> (Lagomorpha: Ochotonidae) from Porcupine Cave

Jim I. Mead, Margarita Erbajeva and Sandra L. Swift

in Biodiversity Response to Climate Change in the Middle Pleistocene

Published by University of California Press

Published in print February 2004 | ISBN: 9780520240827
Published online March 2012 | e-ISBN: 9780520930858 | DOI:
Middle Pleistocene (Irvingtonian) Ochotona (Lagomorpha: Ochotonidae) from Porcupine Cave

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The lagomorph family Ochotonidae, represented today by a single living genus (Ochotona [pika]), originated in the middle Oligocene of Asia. The North American record of Ochotona is sparse until the early Pleistocene Irvingtonian, when a more widespread occurrence is indicated. At least two morphological forms of Ochotona lived in North America during the Irvingtonian, one large and one small. This chapter presents the first record of Irvingtonian Ochotona from the intermountain West, a record from high-elevation Porcupine Cave, Colorado.

Keywords: lagomorph; Ochotonidae; Ochotona; pika; Porcupine Cave

Chapter.  4554 words.  Illustrated.

Subjects: Evolutionary Biology

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