Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Rhynchohydracaridae Lundblad, 1936 1 Subfamily Clathrosperchontinae Lundblad, 1936 2 Subfamily Rhynchohydracarinae Lundblad, 1936 [monotypic] 3 Subfamily Santiagocarinae Valdecasas, 2001