Taxon tree

Infraorder Anomura
Infraorder Brachyura
- Section Eubrachyura
  - Subsection Heterotremata
    - Superfamily Aethroidea
    - Superfamily Bythograeoidea
    - Superfamily Calappoidea
    - Superfamily Cancroidea
    - Superfamily Carpilioidea
    - Superfamily Cheiragonoidea
    - Superfamily Corystoidea
    - Superfamily Dairoidea
    - Superfamily Dorippoidea
    - Superfamily Eriphioidea
    - Superfamily Gecarcinucoidea
    - Superfamily Goneplacoidea
    - Superfamily Hexapodoidea
    - Superfamily Hymenosomatoidea
    - Superfamily Leucosioidea
    - Superfamily Majoidea
    - Superfamily Orithyioidea
    - Superfamily Palicoidea
    - Superfamily Parthenopoidea
    - Superfamily Pilumnoidea
    - Superfamily Portunoidea
    - Superfamily Potamoidea
    - Superfamily Pseudothelphusoidea
    - Superfamily Pseudozioidea
    - Superfamily Retroplumoidea
    - Superfamily Trapezioidea
    - Superfamily Trichodactyloidea
    - Superfamily Trichopeltarioidea
    - Superfamily Xanthoidea
      - Family Panopeidae
        
        Genus Acantholobulus
        
        Genus Chasmophora
        
        Genus Cycloplax
        
        Genus Cyrtoplax
        
        Genus Dyspanopeus
        
        Genus Eucratopsis
        
        Genus Eurypanopeus
        
        Genus Eurytium
        
        Genus Glyptoplax
        
        Genus Hexapanopeus
        
        Genus Homoioplax
        
        Genus Lophopanopeus
        
        Genus Lophoxanthus
        
        Genus Malacoplax
        
        Species Malacoplax californiensis
        
        Genus Metopocarcinus
        
        Genus Milnepanopeus
        
        Genus Neopanope
        
        Genus Odontoplax
        
        Genus Panopeus
        
        Genus Panoplax
        
        Genus Prionoplax
        
        Genus Rhithropanopeus
        
        Genus Robertsella
        
        Genus Tetraplax
        
        Genus Tetraxanthus
        
        Genus Thalassoplax
      - Family Pseudorhombilidae
      - Family Xanthidae
  - Subsection Thoracotremata
- Section Podotremata

Malacoplax

Genus, Guinot, 1969