Chelicerata Heymons, 1901 see Superclass Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Class] Arachnida Lamarck, 1801 [Subclass] Acari Leach, 1817 - mites and ticks [Order] Acariformes Zakhvatkin, 1952 see Superorder Acariformes Zakhvatkin, 1952