Subclass Acari Leach, 1817 - mites and ticks Superorder Parasitiformes Reuter, 1909 - ticks and ticklike mites Order Mesostigmata Canestrini, 1891 1 Suborder Sejida Kramer, 1885 [monotypic] 2 Suborder Trigynaspida Camin & Gorirossi, 1955 3 Suborder Monogynaspida Camin & Gorirossi, 1955