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montanus, in Wyoming and Colorado, by Sydney Anderson
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Title: Subspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and Colorado
Author: Sydney Anderson
Release Date: March 22, 2010 [EBook #31730]
Language: English
Character set encoding: ASCII
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UNIVERSITY OF KANSAS PUBLICATIONS
MUSEUM OF NATURAL HISTORY
Volume 7, No. 7, pp. 489-506, 2 figures in text
July 23, 1954
Subspeciation in the Meadow Mouse,
Microtus montanus, in Wyoming
and Colorado
BY
SYDNEY ANDERSON
UNIVERSITY OF KANSAS
LAWRENCE
1954
UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY
Editors: E. Raymond Hall, Chairman, A. Byron Leonard,
Robert W. Wilson
Volume 7, No. 7, pp. 489-506, 2 figures in text
Published July 23, 1954
UNIVERSITY OF KANSAS
Lawrence, Kansas
PRINTED BY
FERD VOILAND, JR., STATE PRINTER
TOPEKA, KANSAS
1954
25-3560
Subspeciation in the Meadow Mouse, Microtus montanus, in Wyoming and
Colorado
BY
SYDNEY ANDERSON
_Microtus montanus_ reaches the eastern limits of its geographic
distribution in Wyoming and Colorado. There the mountains, but in
general not the lowlands, are occupied by this species. A certain
minimum of moisture may be of direct importance to the mouse and
certainly is indirectly important, because certain hydrophytic or
mesophytic grasses used by the mouse for food, for protection from
enemies, and for shelter from the elements are dependent on the
moisture. Areas suitable for _Microtus montanus_ are separated by
deserts that are dominated by sagebrush and other xerophytic plants or
by forests or rocky exposures at higher altitudes. A relatively small
percentage, probably less than ten per cent, of the total area even in
the more favorable parts of the range of
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