1. Genus Abrolophus Berlese, 1891
2. Superfamily Adamystoidea
3. Superfamily Anystoidea
4. Superfamily Arrenuroidea Thor, 1900
5. Superfamily Bdelloidea
6. Superfamily Caeculoidea
7. Superfamily Calyptostomatoidea
8. Superfamily Cheyletoidea
9. Superfamily Chyzerioidea
10. Superfamily Dolichocyboidea
11. Genus Ereynetes Berlese, 1883
12. Superfamily Eriophyoidea
13. Superfamily Erythraeoidea
14. Superfamily Eupodoidea
15. Superfamily Eylaoidea Leach, 1815
16. Superfamily Halacaroidea Cunliffe, 1954
17. Superfamily Heterocheyloidea
18. Suborder Hydrachnidia
19. Superfamily Hydrachnoidea Leach, 1815
20. Superfamily Hydrovolzioidea Thor, 1905
21. Superfamily Hydryphantoidea Piersig, 1896
22. Superfamily Hygrobatoidea Koch, 1842
23. Superfamily Labidostomatoidea
24. Superfamily Lebertioidea Thor, 1900
25. Superfamily Myobioidea
26. Superfamily Paratydeoidea
27. Superfamily Pomerantzioidea
28. Superfamily Pterygosomatoidea
29. Superfamily Pyemotoidea
30. Family Pygmephoridae Cross, 1965
31. Superfamily Pygmephoroidea
32. Superfamily Raphignathoidea
33. Superfamily Scutacaroidea
34. Superfamily Stygothrombidioidea Mullen & Grandjean, 1980
35. Superfamily Tanaupodoidea
36. Superfamily Tarsocheyloidea
37. Superfamily Tarsonemoidea
38. Superfamily Tetranychoidea
39. Superfamily Trochometridioidea
40. Superfamily Trombiculoidea
41. Superfamily Trombidioidea
42. Superfamily Tydeoidea

 The webpage text is licensed under a Creative Commons Attribution 4.0 License