Kingdom: Animalia

Phylum: Arthropoda

    Subphylum: Crustacea

Class: Malacostraca

• traditional crustacean head

• 8 thoracic segments, 6 abdominal segments 
  with biramous appendages

• gills on thoracic appendages

Order: Decapoda

• abdominal brooders

• compound eyes on stalks

• carapace fused with thorax

    Infraorder: Brachyura 

• true crabs

Family: Grapsoidae 

Genus: Pachygrapsus

Species: crassipes