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
      - Family Acidopsidae
      - Family Chasmocarcinidae
      - Family Conleyidae
      - Family Euryplacidae
        
        Genus Eucrate
        
        Genus Euryplax
        
        Genus Frevillea
        
        Genus Henicoplax
        
        Genus Heteroplax
        
        Genus Machaerus
        
        Species Machaerus atlanticus
        
        Species Machaerus elata
        
        Species Machaerus oxyacantha
        
        Species Machaerus oxyacanthus
        
        Genus Nancyplax
        
        Genus Platyozius
        
        Genus Psopheticoides
        
        Genus Systroplax
        
        Genus Trissoplax
        
        Genus Trizocarcinus
        
        Genus Villoplax
        
        Genus Xenocrate
      - Family Goneplacidae
      - Family Litocheiridae
      - Family Litocheiridae
      - Family Mathildellidae
      - Family Progeryonidae
      - Family Scalopidiidae
      - Family Sotoplacidae
      - Family Vultocinidae
    - 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
  - Subsection Thoracotremata
- Section Podotremata

Machaerus

Genus, Leach, 1818