Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)
7. Arthropoda (phylum)
8. Crustacea (subphylum)
9. Malacostraca (class)
10. Decapoda (order)
11. Astacidea (infraorder)

Anotations

Scope note:

Members of a family of large marine stalk-eyed ten-footed long-tailed crustacean having a first pair of feet that are very large and form the characteristic claws (chelae), a rigid segmented exoskeleton, compound eyes on movable stalks, two pairs of long antennae, and a flipper-like muscular tail that is used for swimming by propelling the animal backward. Members of other families of crustaceans may have the word "lobster" in their common name.