Hydrachnidia Krantz, 1978 - water mites Superfamily Arrenuroidea Thor, 1900 Family Hungarohydracaridae Motaş & Tanasachi, 1959 Subfamily Hungarohydracarinae Motaş & Tanasachi, 1959 1 Genus Bharatohydracarus Cook, 1967 2 Genus Hungarohydracarus Szalay, 1943 3 Genus Stygarrenurus Cook, 1980