Malacostraca is the lairgest o the six classes o crustaceans, conteenin aboot 40,000 livin species, dividit amang 16 orders.

Malacostraca
Temporal range: Cambrian–Recent
Scientific classification e
Kinrick: Animalia
Phylum: Arthropoda
Subphylum: Crustacea
Cless: Malacostraca
Latreille, 1802
Subclesses

See text for orders.