| Order | Holothyrida Thon, 1905
| 3 18 67 | Families Genera Species |
| Order | Ixodida Sundevall, 1833 Hard ticks, Soft ticks, Tick, Ticks | 5 159 2724 | Families Genera Species |
| Order | Mesostigmata Canestrini, 1891 Free-living predatory mites, Mesostigs, Mites | 162 1502 21230 | Families Genera Species |
| Order | Metastigmata Canestrini, 1892 ⇒ Ixodida
| 0 0 0 | Families Genera Species |
| Order | Opilioacarida With, 1902 Primitive mites | 2 20 90 | Families Genera Species |