Family Tetranychidae Donnadieu, 1875 Subfamily Bryobiinae Berlese, 1913 - spider mites Tribe Petrobiini Reck, 1952 Genus Petrobia Murray, 1877 1 Subgenus Petrobia (Tetranychina) Banks, 1917 see Genus Petrobia Murray, 1877 2 Subgenus Petrobia (Petrobia) Murray, 1877 3 Subgenus Petrobia (Mesotetranychus) Reck