| Family | Agathotanaidae
Lang, 1971
| 7
79 | Genera
Species |
| Family | Akanthophoreidae
Sieg, 1986
| 10
45 | Genera
Species |
| Family | Anarthruridae
Lang, 1971
| 18
38 | Genera
Species |
| Family | Arthruridae
Bird & Błażewicz, 2025
| 2
2 | Genera
Species |
| Family | Caudalongidae
Błażewicz & Bird, 2024
| 4
11 | Genera
Species |
| Family | Colletteidae
Larsen & Wilson, 2002
| 23
105 | Genera
Species |
| Family | Cryptocopidae
Bird & Larsen, 2009
| 4
5 | Genera
Species |
| Family | Hamatipedidae
Błażewicz, Gellert & Bird, 2022
| 3
11 | Genera
Species |
| Family | Heterotanoididae
Bird, 2012
| 1
0 | Genus
Species |
| Family | Leptochelidae
Lang, 1973 ⇒ Leptocheliidae
| 0
0 | Genera
Species |
| Family | Leptocheliidae
Lang, 1973
| 42
305 | Genera
Species |
| Family | Leptognathiiadae
Sieg, 1976
| 0
0 | Genera
Species |
| Family | Leptognathiidae
Sieg, 1976
| 2
111 | Genera
Species |
| Family | Mirandotanaidae
Blazewicz-Paszkowycz & Bamber, 2009
| 2
3 | Genera
Species |
| Family | Nototanaidae
Sieg, 1976
| 17
172 | Genera
Species |
| Family | Paranarthrurellidae
Błażewicz, Jóźwiak & Frutos, 2019
| 2
6 | Genera
Species |
| Family | Paratanaidae
Lang, 1949
| 12
86 | Genera
Species |
| Family | Plakathriidae ⇒ Plakarthriidae
| 1
1 | Genus
Species |
| Family | Pleopteryxidae
Schweigert & Garassino, 2006
| 1
1 | Genus
Species |
| Family | Psammaspidae
| 1
1 | Genus
Species |
| Family | Pseudotanaidae
Sieg, 1976
| 11
144 | Genera
Species |
| Family | Pseudozeuxidae
Sieg, 1982
| 3
5 | Genera
Species |
| Family | Rhinocarididae
Hall & Clarke, 1888
| 11
31 | Genera
Species |
| Family | Tanaellidae
Larsen & Wilson, 2002
| 6
69 | Genera
Species |
| Family | Tanaissuidae
Bird & Larsen, 2009
| 3
4 | Genera
Species |
| Family | Tanaopsidae
B& 322;a& 380;ewicz-Paszkowycz & Bamber, 2012
| 1
1 | Genus
Species |
| Family | Teleotanaidae
Bamber, 2008
| 0
0 | Genera
Species |
| Family | Typhlotanaidae
Sieg, 1986 ⇒ Nototanaidae
| 24
74 | Genera
Species |
| Genus | Andrognathia
Sieg, 1983
| 1 | Species |
| Genus | Androtanais
Sieg, 1976
| 1 | Species |
| Genus | Monstrotanais
Kudinova-Pasternak, 1981
| 3 | Species |
| Genus | Salemia
Lang, 1971
| 2 | Species |
| Genus | Singularia
Blazewicz-Paszkowycz, 2005
| 0 | Species |
| Genus | Unispinosus
Chim & Tong, 2020
| 1 | Species |
