Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       Family Geomyidae Bonaparte, 1845 - pocket gophers
         Genus Pappogeomys Merriam, 1895 - Alcorn's and Buller's pocket gophers
           01 Pappogeomys alcorni Russell, 1957 - Alcorn's pocket gopher
           02 Pappogeomys bulleri (Thomas), 1892 - Buller's pocket gopher
           03 Pappogeomys castanops (Baird, 1852) - yellow-faced pocket gopher
           04 Pappogeomys fumosus (Merriam, 1892) - smoky pocket gopher
           05 Pappogeomys gymnurus (Merriam, 1892) - Llano pocket gopher
           06 Pappogeomys merriami (Thomas, 1893) - Merriam's pocket gopher
           07 Pappogeomys neglectus (Merriam, 1902) - Queretaro pocket gopher
           08 Pappogeomys tylorhinus (Merriam, 1895) - Taylor's pocket gopher
           09 Pappogeomys zinseri (Goldman, 1939) - Zinser's pocket gopher
           10 Subgenus Pappogeomys Merriam, 1895
           11 Subgenus Cratogeomys Merriam, 1895