Hydrachnidia Krantz, 1978 - water mites Superfamily Arrenuroidea Thor, 1900 Family Krendowskiidae Viets, 1926 Genus Geayia Thor, 1897 1 Subgenus Geayia (Geayia) Thor, 1897 2 Subgenus Geayia (Geayella) Lundblad, 1936 3 Subgenus Geayia (Geayidea) Lundblad, 1941 4 Subgenus Geayia (Pirapama) Viets, 1935