| Family | Astacocrotidae
Thor, 1927 ⇒ Astacocrotonidae
| 0
0 | Genera
Species |
| Family | Astacocrotonidae
Thor, 1927
| 1
1 | Genus
Species |
| Family | Aturidae
Thor, 1900
| 126
1011 | Genera
Species |
| Family | Axonopsidae
Habeeb, 1953 ⇒ Aturidae
| 3
6 | Genera
Species |
| Family | Feltriidae
Viets, 1926
| 5
157 | Genera
Species |
| Family | Ferradasiidae
Cook, 1980
| 1
1 | Genus
Species |
| Family | Frontipodopsidae
Viets, 1931
| 2
23 | Genera
Species |
| Family | Hygrobatidae
Koch, 1842
| 135
1366 | Genera
Species |
| Family | Lethaxonidae
Cook, Smith & Harvey, 2000 ⇒ Axonopsinae
| 1
0 | Genus
Species |
| Family | Limnesiidae
Thor, 1900
| 50
500 | Genera
Species |
| Family | Nautarachnidae
Walter, 1925 ⇒ Pionidae
| 0
0 | Genera
Species |
| Family | Omartacaridae
Cook, 1963
| 3
15 | Genera
Species |
| Family | Pionidae
Thor, 1900
| 41
702 | Genera
Species |
| Family | Pontarachnidae
Koenike, 1910
| 2
70 | Genera
Species |
| Family | Unionicolidae
Oudemans, 1909
| 109
1008 | Genera
Species |
| Family | Wettinidae
Cook, 1956
| 4
11 | Genera
Species |
