Subclass Acari Leach, 1817 - mites and ticks
   Superorder Parasitiformes Reuter, 1909 - ticks and ticklike mites
     Order Mesostigmata Canestrini, 1891
       Suborder Monogynaspida Camin & Gorirossi, 1955
         1 Cohort Microgyniina Trägårdh, 1942 [monotypic] see Suborder Microgyniina Trägårdh, 1942
         2 Cohort Heatherellina Lindquist, Krantz & Walter, 2009 [monotypic] see Hyporder Epicriiae Kramer, 1885
         3 Cohort Uropodina Kramer, 1881 see Infraorder Uropodina Kramer, 1881
         4 Cohort Heterozerconina [monotypic] see Superfamily Heterozerconoidea Berlese, 1892
         5 Cohort Gamasina Kramer, 1881 see Infraorder Gamasina Kramer, 1881