Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Heteromyidae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice
         1 Subfamily Dipodomyinae Gervais, 1853
         2 Subfamily Heteromyinae Gray, 1868 - pocket mice, kangaroo rats, and kangaroo mice
         3 Subfamily Perognathinae Coues, 1875