| Family | Acanthogammaridae
Garjajeff, 1901
| 44
257 | Genera
Species |
| Family | Acanthonotozomatidae
Stebbing, 1906 ⇒ Iphimediidae
| 2
2 | Genera
Species |
| Family | Anisogammaridae
Bousfield, 1977
| 13
97 | Genera
Species |
| Family | Baikalogammaridae
Kamaltynov, 2001
| 1
1 | Genus
Species |
| Family | Bathyporeiidae
d´Udekem d´Acoz, 2011
| 1
3 | Genus
Species |
| Family | Behningiellidae
Kamaltynov, 2001
| 3
5 | Genera
Species |
| Family | Cardenioidae
Barnard & Karaman, 1987
| 1
1 | Genus
Species |
| Family | Crypturopodidae
Kamaltynov, 2002
| 9
53 | Genera
Species |
| Family | Didymocheliidae
Bellan-Santini & Ledoyer, 1986
| 3
5 | Genera
Species |
| Family | Eulimnogammaridae
Kamaltynov, 1999
| 20
188 | Genera
Species |
| Family | Falklandellidae
Lowry & Myers, 2012
| 3
5 | Genera
Species |
| Family | Gammaracanthidae
Bousfield, 1989
| 2
14 | Genera
Species |
| Family | Gammarellidae
Bousfield, 1977
| 5
19 | Genera
Species |
| Family | Gammaridae
Leach, 1813
Gammarids, Scuds | 174
1250 | Genera
Species |
| Family | Gammaroporeiidae
Bousfield, 1979
| 1
1 | Genus
Species |
| Family | Iphigenellidae
Kamaltynov, 2001
| 1
1 | Genus
Species |
| Family | Luciobliviidae
Tomikawa, 2007
| 1
1 | Genus
Species |
| Family | Macrohectopidae
Sowinsky, 1915
| 5
4 | Genera
Species |
| Family | Mesogammaridae
Bousfield, 1977
| 6
12 | Genera
Species |
| Family | Micruropidae
Kamaltynov, 1999
| 0
0 | Genera
Species |
| Family | Micruropodidae
Kamaltynov, 1999
| 4
130 | Genera
Species |
| Family | Miramarassidae
Lowry, 2006
| 1
1 | Genus
Species |
| Family | Ommatogammaridae
Kamaltynov, 2010
| 3
12 | Genera
Species |
| Family | Pachyschesidae
Kamaltynov, 1999
| 1
16 | Genus
Species |
| Family | Pallaseidae
Tachteew, 2000
| 104
392 | Genera
Species |
| Family | Paraleptamphopidae
Bousfield, 1977
| 1
1 | Genus
Species |
| Family | Phreatogammaridae
Bousfield, 1982
| 3
7 | Genera
Species |
| Family | Pontogammaridae
Bousfield, 1977
| 8
40 | Genera
Species |
| Family | Sensonatoridae
Lowry & Myers, 2012
| 0
0 | Genera
Species |
| Family | Thurstonellidae
Lowry & Zeidler, 2008
| 1
1 | Genus
Species |
| Family | Typhlogammaridae
Bousfield, 1977
| 6
16 | Genera
Species |
| Family | Valettiidae
Stebbing, 1888
| 0
0 | Genera
Species |
| Family | Zaramillidae
Lowry & Myers, 2016
| 0
0 | Genera
Species |
