Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Hydryphantidae Piersig, 1896 Subfamily Eupatrellinae Viets, 1935 1 Genus Eupatrella Walter, 1935 2 Genus Protziella Lundblad, 1934