Phylum Nematoda Gegenbaur, 1859 - round worms
   Class Secernentea Von Linstow, 1905
     Subclass Tylenchia (Thorne, 1949) Inglis, 1983
       Order Tylenchida G. Thorne, 1949
         Suborder Criconematina Siddiqi, 1980
           Superfamily Criconematoidea Taylor, 1936 (1914)
             Family Criconematidae Taylor, 1936 (1914)
               Subfamily Criconematinae Taylor, 1936 (1914)
                 Genus Ogma Southern, 1914
                   1 Subgenus Ogma Southern, 1914
                   2 Subgenus Croserinema Khan, Chawla & Saha, 1976
                   3 Subgenus Macrocriconema Minagawa, 1986
                   4 Subgenus Orphreyus Siddiqi, 2000
                   5 Subgenus Pateracephalanema Mehta & Raski, 1971
                   6 Subgenus Seriespinula Mehra & Raski, 1971