Smithsonian National Museum of Natural History, North American Mammals
Search the Archive

  Rodentia · Heteromyidae · Liomys irroratus
   Smithsonian Institution
   Copyright Notice
   Privacy Notice
Liomys irroratus

Mexican Spiny Pocket Mouse

Order: Rodentia
Family: Heteromyidae

Image of Liomys irroratus
Click to enlarge. (90 kb)

Conservation Status: Least Concern.

The Mexican Spiny Pocket Mouse occurs in central and northeastern Mexico and the extreme south of Texas. It inhabits a variety of semi-arid brushy or rocky habitats, and is common where it lives. The "pockets" of the pocket Mouse are fur-lined cheek pouches, where seeds are carried from the foraging area to the burrow. Mexican Spiny Pocket Mice are grayish-brown, with white underparts. On the back, a mixture of stiff spiny hairs and soft ones gives the animal a somewhat coarse appearance. These Mice are nocturnal and are active year-round.

Sexual Dimorphism:
Males are larger than females.

Average: 238 mm males; 226 mm females
Range: 216-262 mm males; 207-251 mm females

Range: 40-60 g males; 35-50 g females


Merriam, C.H., 1902.  Twenty new pocket mice (Heteromys and Liomys) from Mexico, p. 44.  Proceedings of the Biological Society of Washington, 15:41-50.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Liomys irroratus