Subclass Acari Leach, 1817 - mites and ticks
   Superorder Parasitiformes Reuter, 1909 - ticks and ticklike mites
     Order Mesostigmata Canestrini, 1891
       Suborder Monogynaspida Camin & Gorirossi, 1955
         Cohort Gamasina Kramer, 1881 see Infraorder Gamasina Kramer, 1881
           a Subcohort Epicriiae Vitzthum, 1938 see Hyporder Epicriiae Vitzthum, 1938
           b Subcohort Arctacariae Johnston, 1982 [monotypic] see Hyporder Arctacariae Johnston, 1982
           c Subcohort Parasitiae Reuter, 1909 [monotypic] see Hyporder Parasitiae Reuter, 1909
           d Subcohort Dermanyssiae Evans & Till, 1979 see Hyporder Dermanyssiae Evans & Till, 1979