Hydrachnidia Krantz, 1978 - water mites
   Superfamily Hygrobatoidea Koch, 1842
     Family Omartacaridae Cook, 1963
       Subfamily Omartacarinae Cook, 1963 [monotypic]
         Genus Omartacarus Cook, 1963
           Subgenus Omartacarus (Omartacarellus) Cook, 1974