Phenacomys intermedius

Haystack Cave, Gunnison County, Colorado, has provided the first collection of vertebrate remains from the Pleistocene (Rancholabrean) of western Colorado. Two carbon 14 analyses of bone apatite have produced dates of 14,935 ± 610 and 12,154 ± 1,700 years B.P. for this assemblage. This fauna, in conjunction with pollen studies, indicates the Gunnison Basin was largely unforested grassland/sagebrush shrubland in the lower basin, with open coniferous forests extending to the edges of the basin, during the late Pleistocene. The fauna also extends the known Pleistocene range of Lagurus curtatus, Phenacomys intermedius, Spilogale putorius, and Acinonyx trumani.

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HELMINTHS OF MICROTINAE IN WESTERN MONTANA

Canadian Journal of Zoology ◽

10.1139/z67-038 ◽

1967 ◽

Vol 45 (3) ◽

pp. 269-274 ◽

Cited By ~ 7

Author(s):

John M. Kinsella

Keyword(s):

High Frequency ◽

New Records ◽

First Record ◽

Microtus Pennsylvanicus ◽

Western Montana ◽

Seasonal Patterns ◽

Mixed Infections ◽

Microtus Montanus ◽

Phenacomys Intermedius ◽

Aspiculuris Tetraptera

Seventeen species of helminths were found in 134 voles of 5 species (Phenacomys intermedius, Clethrionomys gapperi, Microtus longicaudus, Microtus montanus, Microtus pennsylvanicus) collected in 1964 and 1965 in western Montana. Ten new records for North America and 26 new records for Montana were recorded. Seasonal patterns of infection were noted in Quinqueserialis quinqueserialis and Paranoplocephala infrequens. The taxonomy of the nematode Heligmosomum dubius (Baylis, 1926) Tenora, 1958 was discussed. The first record of Aspiculuris tetraptera in. microitne rodents and the second record of Pelodera sp. in the orbits of North American rodents were reported. A high frequency of mixed infections of the digestive tract was found, usually accompanied by a pronounced stratification of the helminths within the tract.

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Phenacomys intermedius (Heather vole)

An Atlas of Mammalian Chromosomes ◽

10.1007/978-1-4612-9824-3_23 ◽

1971 ◽

pp. 117-119

Author(s):

T. C. Hsu ◽

Kurt Benirschke

Keyword(s):

Phenacomys Intermedius

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Conifer-seed preferences of small mammals

Canadian Journal of Zoology ◽

10.1139/z09-070 ◽

2009 ◽

Vol 87 (9) ◽

pp. 773-780 ◽

Cited By ~ 19

Author(s):

N. Lobo ◽

M. Duong ◽

J. S. Millar

Keyword(s):

Small Mammals ◽

Picea Glauca ◽

Peromyscus Maniculatus ◽

Lodgepole Pine ◽

Deer Mouse ◽

White Spruce ◽

Meadow Vole ◽

Seed Selection ◽

Subalpine Fir ◽

Phenacomys Intermedius

The preferences of the deer mouse ( Peromyscus maniculatus (Wagner, 1845)), southern red-backed vole ( Myodes gapperi (Vigors, 1830)), heather vole ( Phenacomys intermedius Merriam, 1889), long-tailed vole ( Microtus longicaudus (Merriam, 1888)), and meadow vole ( Microtus pennsylvanicus (Ord, 1851)) for lodgepole pine ( Pinus contorta Dougl. ex Loud.), white spruce ( Picea glauca (Moench.) Voss), and subalpine fir ( Abies lasiocarpa (Hook.) Nutt.) seeds were investigated using cafeteria-style feeding experiments. Seed selection by P. maniculatus and M. gapperi in the field was also studied. Peromyscus maniculatus, M. gapperi, M. longicaudus, and M. pennsylvanicus showed a distinct preference for lodgepole pine seeds and avoidance of subalpine fir seeds, and consumed the different species of seeds in similar relative proportions. Phenacomys intermedius behaved very differently from the other rodent species in that it did not show a preference among seed species, and consumed very few seeds in total. Findings from the field seed selection trials were consistent with laboratory results. We suggest that postdispersal seed predation by small mammals could limit the recruitment success of lodgepole pine and white spruce, but would not be a major problem in the regeneration of subalpine fir stands. This could provide an advantage for subalpine fir over neighbouring competitive species.

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