. Biology of New World Microtus. Rodents; Rodents; Microtus; Voles. Fig. 4. Selected morphotypes of ml in Pitymys. A, P. sp.; B, P. llanensis; C, P. ochrogaster; D, P. meadensis; E, P. quasiater; F, P. pinetorwn. See text for additional explanation. Pitymys is thought to have descended from Mimomys (van der Meulen, 1974), probably in Asia. The first appearance in the New^ World is near the beginning of the Pleistocene at Wellsch Valley (13) in Saskatchewan (Figs. 1, 3). Later taxa may have resulted from speciation in North America or subsequent migration over the Bering Land Please no

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. Biology of New World Microtus. Rodents; Rodents; Microtus; Voles. Fig. 4. Selected morphotypes of ml in Pitymys. A, P. sp.; B, P. llanensis; C, P. ochrogaster; D, P. meadensis; E, P. quasiater; F, P. pinetorwn. See text for additional explanation. Pitymys is thought to have descended from Mimomys (van der Meulen, 1974), probably in Asia. The first appearance in the New^ World is near the beginning of the Pleistocene at Wellsch Valley (13) in Saskatchewan (Figs. 1, 3). Later taxa may have resulted from speciation in North America or subsequent migration over the Bering Land Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tamarin, Robert H; American Society of Mammalogists. [Stillwater, Okla. ] : American Society of Mammalogists ; Shippensburg, Pa. : distributed by Vertebrate Museum, Shippensburg University

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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectrodents