Hydrachnidia Krantz, 1978 - water mites Superfamily Lebertioidea Thor, 1900 Family Sperchontidae Thor, 1900 Subfamily Sperchontinae Thor, 1900 Genus Sperchon Kramer, 1877 1 Subgenus Sperchon (Sperchon) Kramer, 1877 2 Subgenus Sperchon (Acadiosperchon) Habeeb, 1959 3 Subgenus Sperchon (Hispidosperchon) Thor, 1901 4 Subgenus Sperchon (Palpisperchon) Lundblad, 1941