Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Zelandothyadidae Cook, 1983 Subfamily Zelandothyadinae Cook, 1983 1 Genus Malgasacarus Tuzovskij, Gerecke & Goldschmidt, 2007 2 Genus Zelandothyas Cook, 1983