Smithsonian National Museum of Natural History, North American Mammals
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Chaetodipus spinatus

Spiny Pocket Mouse

Order: Rodentia
Family: Heteromyidae

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Conservation Status: Least Concern.

The Spiny Pocket Mouse is somewhat shaggy. Its spines, which are mostly on the rump, are not nearly as stiff as porcupine quills. Like quills, they are modified hairs. This Pocket Mouse occurs throughout most of Baja California, Mexico, and on some of the islands off the coast. In the United States, it occurs only in extreme southeastern and south-central California west of the Colorado River. The Rock Pocket Mouse lives east of the river in identical habitat. Because these animals choose places of little agricultural value, their habitats are probably safe from development and their futures as species secure.

Sexual Dimorphism:

Average: 198 mm
Range: 164-225 mm

Range: 13-18 g


Merriam, C.H., 1889.  Preliminary revision of the North American pocket mice (genera Perognathus et Cricetodipus auct.) with descriptions of new species and subspecies and a key to the known forms, p. 21.  North American Fauna, 1:1-36.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Chaetodipus spinatus

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