| This spiny pocket mouse is described as medium-sized for the genus. To get an idea what that means, a compact disk weighs about 15 g, and four adult male mice had an average weight of 70.7 g, less than five cd's. Six females averaged 56.6 g, less than four cd's. Gaumer’s Spiny Pocket Mouse has a broad orangish stripe on its side, all the way from its cheeks to the base of its tail, and even on its ankles, and its tail and the soles of its hind feet are hairy. Desmarest’s Spiny Pocket Mouse, which occurs in some of the same places, has a narrower, shorter, paler stripe, its tail is only sparsely covered with hairs, and hair does not cover as much of the soles of its hind feet.
Like all pocket mice, these tiny, long-tailed mammals have external, fur-lined cheek pouches that they stuff with seeds and nuts when they are out at night foraging. They can then eat their haul in the safety of the burrow or save it for a rainy day. They usually stay in the burrow on cold or wet days. They live in a variety of kinds of forests, and are also sometimes found in agricultural areas.
Head and Body: 108-142 mm; Tail: 128-178 mm
Allen, J.A, & F.M. Chapman, 1897. Bulletin of the American Museum of Natural History, 9:9.
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