| Family | Clathrosperchonidae
Lundblad, 1936 ⇒ Rhynchohydracaridae
| 0
0 | Genera
Species |
| Family | Ctenothyadidae
Cook & Hopkins, 1998
| 2
3 | Genera
Species |
| Family | Eupatrellidae
Viets, 1935
| 0
0 | Genera
Species |
| Family | Hydrodromidae
Viets, 1936
| 5
71 | Genera
Species |
| Family | Hydryphantidae
Piersig, 1896
| 101
718 | Genera
Species |
| Family | Malgasacaridae
Tuzovskij, Gerecke & Goldschmidt, 2007
| 1
1 | Genus
Species |
| Family | Protziidae
Habeeb, 1954 ⇒ Hydryphantidae
| 0
0 | Genera
Species |
| Family | Pseudohydryphantidae
Viets, 1926 ⇒ Pseudohydryphantinae
| 0
0 | Genera
Species |
| Family | Rhynchohydracaridae
Lundblad, 1936
| 4
3 | Genera
Species |
| Family | Teratothyadidae
Viets, 1929
| 4
19 | Genera
Species |
| Family | Thermacaridae
Sokolow, 1927
| 1
4 | Genus
Species |
| Family | Thyasidae
Koenike, 1892 ⇒ Hydryphantidae
| 2
8 | Genera
Species |
| Family | Zelandothyadidae
Smit, 1996
| 2
4 | Genera
Species |
