JohnstonianidaeJohnstonianidae is a family of mites in the order Trombidiformes. There are about 7 genera and more than 20 described species in Johnstonianidae.GeneraThese seven genera belong to the family Johnstonianidae:Centrotrombidium Kramer, 1896Charadracarus Newell, 1960Diplothrombium Berlese, 1910Hirstiothrombium Oudemans, 1947Johnstoniana George, 1909Marcandreella Feider, 1957Tetrathrombium Feider, 1955