John A. White

Name: Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus
Author: John A. White

Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

Summary

“Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus”, is a work by John A. White. It explores elements such as dorsal dark stripe, Sayal Brown and subspecies.

Quotes from Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus (John A. White)

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ The differences in anatomy and color between many species of chipmunks are subtle, and refined techniques are required to discover them. When "measuring" chipmunks taxonomically, it is necessary to use a "chipmunk scale" and not, for example, a "pocket-gopher scale." In explanation, some species of pocket gophers closely allied to each other, and even some subspecies of the same species, differ markedly in color and in size and shape of parts of the skeleton; comparable differences are not so pronounced among many species of chipmunks. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ In a large part of the geographic range of E. q. hopiensis there are numerous, massive outcrops of Mesozoic sandstones, which tend to form cliffs, that are brightly colored with many shades of red. The color which is characteristic of E. q. hopiensis seems to be helpful in adapting this subspecies to this habitat of red sandstone, for these chipmunks are generally found in the rubble and among the piñon at the base of the cliffs. At many places in Utah above these cliffs of red sandstone there are forests predominantly composed of yellow pine. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ E. umbrinus-like chipmunks were present, before the uplift of the major chains of mountains, on isolated, low mountain ranges that were not covered with glaciers (such as the laccolithic mountains that occur in Utah) in Pleistocene time, while E. quadrivittatus-like chipmunks were present in the central parts of New Mexico, Colorado, and southern Wyoming. With the advent of uplift, the habitats in the central parts of these states were changed from a plains-like habitat to a habitat that resembled the forest habitats that exist today. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Skull and Baculum: As in E. u. umbrinus.
Comparisons.—From E. u. inyoensis, the subspecies to the west, E. u. adsitus differs in: General tone of upper parts darker; sides darker; interorbital region wider; skull significantly deeper.
For comparison with E. u. umbrinus, E. u. sedulus, and E. u. montanus, see the accounts of those subspecies.
Remarks.—Specimens from West Rim, Zion National Park, 6,500 ft., Washington County, Utah, seem to be intergrades between E. u. adsitus and E. u. inyoensis, and are referable to E. u. adsitus. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Crown Cinnamon-Buff mixed with gray; upper facial stripe Sepia; ocular stripe Chaetura-Drab; submalar stripe Fuscous Black mixed with Sayal Brown; ear black; anterior margin of ear Mars-Yellow, posterior margin grayish white; hairs inside posterior portion of pinna Dresden-Brown; postauricular patch Pale Smoke Gray; median dorsal dark stripe black; lateral dorsal dark stripe black mixed with Sayal Brown; outermost dorsal dark stripe obsolete, Buckhorn-Brown mixed with black; median pair of dorsal light stripes grayish mixed with Buckhorn-Brown; outer pair of dorsal light stripes creamy white ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Paler and grayer throughout; tawny areas restricted; gray areas clearer and less suffused; dark facial markings narrower and less [Pg 575] distinct; ventral surface of tail distinctly paler; feet lighter, clearer gray; nasals extend farther posteriorly with respect to premaxillae (Burt loc. cit.) .
From E. u. adsitus, the subspecies to the northeast, E. u. nevadensis differs in: Narrower dorsal stripes and facial markings; paler coloration of head, rump, sides, feet, and ventral surface of tail (Burt op. cit.: 299-300) . ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Remarks.—The differences between E. umbrinus nevadensis and E. palmeri, as shown by Burt (op. cit.) and Hall (1946) , are such that one might expect E. palmeri to be a subspecies of E. umbrinus. However, having only the structure of the baculum as evidence additional to that summarized by Hall (op. cit.) , I follow him in according E. palmeri specific status.
Specimens examined.—None.
Eutamias umbrinus fremonti new subspecies
Type.—Male, adult, skull, skin, and baculum, No. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Taos Co.: 3 mi. N Taos Pueblo, 5 BS; 23 mi. S and 6 mi. E Taos, 8,750 ft., 2. Union Co.: Emery Peak, 1 BS; Folsom, 3 BS; Sierra Grande, 8 BS; unspecified, 2. McKinley Co.: Bear Ridge, Zuni Mountains, 9 BS. Sandoval Co.: Bear Canyon, W foothills, Sandia Mountains, 3 BS; W foothills, near S end, Sandia Mountains, 7 BS. Santa Fe Co.: San Pedro, 7 BS. San Miguel Co.: Canadian River, 4 mi. NW Tucumcari, 1 BS. Valencia Co.: Mount Taylor, San Mateo Mountains, 10 BS.
Oklahoma: Cimarron Co.: Kenton, 1 BS.
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Eutamias quadrivittatus hopiensis Merriam
Eutamias hopiensis Merriam, Proc. ”

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Source: Gutenberg

John A. White, Taxonomy of the Chipmunks, Eutamias quadrivittatus and Eutamias umbrinus

“ Assistance with field work is acknowledged from the Kansas University Endowment Association, the National Science Foundation, and the United States Navy, Office of Naval Research, through contract No. ”

John A. White

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