Rollin H. Baker

Name: Mammals from Tamaulipas, Mexico
Author: Rollin H. Baker

Summary

“Mammals from Tamaulipas, Mexico”, is a work by Rollin H. Baker. It explores elements such as the Sierra Madre Oriental, underparts and Tamaulipas.

Quotes from Mammals from Tamaulipas, Mexico (Rollin H. Baker)

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ Collections were made at several places in the vicinity of Ciudad Victoria, including localities along the humid, eastern face of the Sierra Madre Oriental. Many of these specimens were obtained near camps made west of the village of El Carrizo. This small community is on the Pan-American highway, 70 kilometers (by highway) south of Ciudad Victoria. The resulting collections, which are reported upon here, disclose that several tropical mammals range farther northward than previously reported. ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ Remarks.—These three specimens have proportionately longer tails than typical P. o. pallidus from central Veracruz; total length and length of tail of two adult males are 575, 295, and 568, 290 respectively.
This marsupial has been previously unrecorded from Tamaulipas or from so northward a locality. The four-eyed opossum evidently ranges northward along the east face of the Sierra Madre Oriental within the humid division of the Upper Tropical Life-zone. These animals, all males, were taken in steel traps baited with the bodies of skinned mice or birds. ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ Forming the northeastern border of Mexico, Tamaulipas extends in an elongated, north-south direction from the Temperate into the Torrid Zone and contains faunal elements from both the Nearctic and Neotropical regions. The mammals are less known than those from some of the bordering states ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ Cotton rats were found abundantly in cultivated areas. Local [Pg 217] farmers stated that these rats were destructive to sugar cane by girdling the stems one and one-half inches above the ground.
Neotoma micropus micropus Baird
Baird Wood Rat
Neotoma micropus Baird, Proc. Acad. Nat. Sci. Philadelphia, p. 333, April, 1855. (Type from Charco Escondido, Tamaulipas, Mexico.)
Specimens examined, 2 from 7 km. S and 2 km. W San Fernando.
Neotoma angustapalata new species
Tamaulipan Wood Rat
Type.—Male, subadult, skin and skull ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ The brown coloring on the underparts is a distinctive feature of P. ochraventer; in adults this color differs in shade. In some specimens patches of whitish hair give the tail a splotched appearance. Eleven of the twenty-eight skulls and lower jaws examined have bone eroded away from around the cheek-teeth exposing part of the roots. Most of the fully adult animals have this condition. One adult female, no. ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ Fauna, 43:11, September 23, 1918) of the first upper molar large, almost as broad as greatest breadth of tooth.
Comparisons.—Peromyscus ochraventer has been compared with P. difficilis (specimens from Veracruz) , P. boylei (Veracruz) , P. banderanus (Guerrero) , P. mexicanus (Veracruz) , P. furvus (Veracruz) , and P. latirostris (San Luis Potosí) . From P. difficilis, P. ochraventer differs in having underparts distinctively brownish, rostrum expanded anteriorly with sides almost parallel, anteriormost loph of the first upper molar larger, and auditory bulla smaller. ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ S Ciudad Victoria and 2 km. W El Carrizo.
Remarks.—This immature male is paler than specimens of O. r. rostratus from the state of Veracruz. This locality extends the known range of this species northward a distance of approximately 100 miles. Previously it had been recorded from only as far north as Alta Mira, Tamaulipas (Goldman, N. Amer. Fauna, 43:54, September 23, 1918) . This specimen was trapped on February 16 in a rodent runway in dense grass in a fallow cane field.
Oryzomys fulvescens engraciae Osgood
Fulvous Rice Rat
Oryzomys fulvescens engraciae Osgood, Jour. ”

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Source: Gutenberg

Rollin H. Baker, Mammals from Tamaulipas, Mexico

“ The adult, male, no. 37062, measures as follows: Total length, 380; tail vertebrae, 195; hind foot, 42; ear from notch, 31; interorbital breadth (of skull) , 6.4.
Specimens examined, 2, from the type locality.
Rattus rattus subsp.
Black Rat
Specimens taken, 2 from 70 km. [by highway] S Ciudad Victoria and 6 km. W of the [Pan-American] highway [at El Carrizo] .
Mus musculus subsp.
House Mouse
Specimen examined, 1 from 12 km. ”

Rollin H. Baker

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