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Description"Many rodents that are adapted to arid conditions--pocket mice, harvest mice, grasshopper mice, deer mice, kangaroo rats, and ground squirrels--occur in the same regions as Jones's Pocket Gopher in western Texas and eastern New Mexico, but only the pocket gophers (family Geomyidae) have a fossorial (that is, underground) lifestyle. Jones's Pocket Gophers are very difficult to distinguish from four other pocket gopher species without genetic and geographic data. At least this is true for scientists: presumably the pocket gopher can easily recognize another of its own species. They breed in the fall, and they produce one litter, of 2-4 offspring, a year. The gestation period is probably only about 23 days, which suggests that the female may store sperm in her body for several months before the eggs are fertilized and embryos begin to develop, or that fertilization may occur but development is delayed. As with many other mammals, much remains to be learned about this species of pocket gopher."
Mammal Species of the World