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 Orthogeomys Merriam, 1895 - taltuzas
           01 Orthogeomys cavator (Bangs), 1902 - Chiriqui pocket gopher
           02 Orthogeomys cherriei (J. A. Allen), 1893 - Cherrie's pocket gopher
           03 Orthogeomys cuniculus Elliot, 1905 - Oaxacan pocket gopher
           04 Orthogeomys dariensis (Goldman), 1912 - Darien pocket gopher
           05 Orthogeomys grandis (Thomas, 1893) - large pocket gopher
           06 Orthogeomys heterodus (Peters), 1865 - variable pocket gopher
           07 Orthogeomys hispidus (Le Conte), 1852 - hispid pocket gopher
           08 Orthogeomys lanius (Elliot), 1905 - big pocket gopher
           09 Orthogeomys matagalpae (J. A. Allen), 1910 - Nicaraguan pocket gopher
           10 Orthogeomys thaeleri Alberico, 1990
           11 Orthogeomys underwoodi (Osgood), 1931 - Underwood's pocket gopher
           12 Subgenus Macrogeomys Merriam
           13 Subgenus Orthogeomys Merriam, 1895
           14 Subgenus Heterogeomys Merriam