| Order | Amphipoda Latreille, 1816 Amphipod, Amphipod Tubes, Amphipod Whips, Amphipods, Scuds | 286 2974 19848 | Families Genera Species |
| Order | Cumacea ♰ Krøyer, 1846 Comma shrimp, Comma shrimps, Cumaceans, Hooded shrimp | 13 231 2377 | Families Genera Species |
| Order | Isopoda Latreille, 1817 And Woodlice, Freshwater Isopods, Indet. Woodlouse, Isopod | 189 2478 21445 | Families Genera Species |
| Order | Lophogastrida G.O. Sars, 1870 Lophogastridans, Lophogastrids, Opossum shrimps | 4 20 92 | Families Genera Species |
| Order | Mictacea Bowman, Garner, Hessler, Iliffe & Sanders, 1985 Mictaceans | 2 4 10 | Families Genera Species |
| Order | Mysida Haworth, 1825 Mysid Shrimp, Mysid shrimps, Mysidans, Mysids | 5 12 63 | Families Genera Species |
| Order | Mysidacea Rathbun, 1915 ⇒ Mysida Mysid shrimp, Opossum shrimps | 0 0 0 | Families Genera Species |
| Order | Spelaeogriphacea Gordon, 1957 Spelaeogriphaceans | 2 7 6 | Families Genera Species |
| Order | Stygiomysida Tchindonova, 1981 Stygiomysidans | 2 4 21 | Families Genera Species |
| Order | Tanaidacea ♰ Dana, 1849 Tanaidaceans, Tanaids | 59 449 2566 | Families Genera Species |