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Geographic Distribution and Taxonomy of the Chipmunks of Wyoming   By:

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Geographic Distribution and Taxonomy of the Chipmunks of Wyoming

By

JOHN A. WHITE

University of Kansas Publications

Museum of Natural History

Volume 5, No. 34, pp. 583 610, 3 figures in text

December 1, 1953

University of Kansas LAWRENCE 1953

UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY

Editors: E. Raymond Hall, Chairman, A. Byron Leonard, and Robert W. Wilson

Volume 5, No. 34, pp. 583 610, 3 figures in text

December 1, 1953

UNIVERSITY OF KANSAS Lawrence, Kansas

PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1953

CONTENTS

PAGE

Purpose 586

Methods, Materials, and Acknowledgments 586

Variation 587 Juveniles 587 Young 587 Subadults 588 Adults 588 Old adults 588

Key to the Species of Chipmunks Inhabiting Wyoming 589

Accounts of Species and Subspecies 590 Eutamias minimus 590 E. m. minimus 591 E. m. consobrinus 593 E. m. pallidus 594 E. m. confinis 596 E. m. silvaticus 597 E. m. operarius 598

Eutamias amoenus 602 E. a. luteiventris 602

Eutamias dorsalis 603 E. d. utahensis 604

Eutamias umbrinus 606 E. u. umbrinus 606 E. u. fremonti 607 E. u. montanus 608

Review and Conclusions 609

Literature Cited 610

FIGURES

Figure 1. Subspecies of Eutamias minimus 590

Figure 2. Eutamias amoenus and Eutamias dorsalis 604

Figure 3. Subspecies of Eutamias umbrinus 605

PURPOSE

The purpose of the following account is to: (1) Show what kinds of chipmunks occur in Wyoming; (2) point out the interrelationships between these kinds; and (3) account, where possible, for the present distribution of these animals in Wyoming.

METHODS, MATERIALS, AND ACKNOWLEDGMENTS

Capitalized color terms in the following accounts are of Ridgway, "Color Standards and Color Nomenclature," Washington, D.C., 1912.

The measurements of the skull that were used in this study were made as shown in White (1953:566, fig. 1). These are: Greatest length of skull, zygomatic breadth, cranial breadth, length of nasals, length of lower tooth row, condylo alveolar length of mandible, and inner mandibular length.

Of the external measurements, only the total length and the length of the tail are recorded in table 1. Some field collectors measured the ear from the notch and others from the crown; most collectors measured the length of the hindfoot to the nearest millimeter rather than in tenths of a millimeter as would have been desirable. Consequently, I decided against using the length of the ear and hindfoot in this report.

When the word "significantly" is used in comparisons, it is meant to show that there is a significant statistical difference between two or more samples... Continue reading book >>




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