Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Geomyidae Bonaparte, 1845 - pocket gophers
       1 Genus Geomys Rafinesque, 1817 - eastern pocket gophers
       2 Genus Thomomys Wied-Neuwied, 1839 - western pocket gophers
       3 Genus Pappogeomys Merriam, 1895 - Alcorn's and Buller's pocket gophers
       4 Genus Orthogeomys Merriam, 1895 - taltuzas
       5 Genus Zygogeomys Merriam, 1895 - tuza