The Crustaceans (Crustacea) - subphylum
more then 67,000 species


(Thylacocephala)
- class

The Shrimps
(Branchiopoda)
- class

The Blind Crustaceans
(Remipedia)
- class

The Horseshoe Shrimps
(Cephalocarida)
- class

The Barnacles & Copepods
(Maxillopoda)
- class

The Seed Shrimps
(Ostracoda)
- class

The Crabs, Crayfish & Lobsters
(Malacostraca)
- class