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
      - Family Epialtidae
      - Family Hymenosomatidae
      - Family Inachidae
      - Family Inachoididae
      - Family Majidae
      - Family Mithracidae
        
        Genus Ala
        
        Genus Amphithrax
        
        Genus Coelocerus
        
        Genus Cyclocoeloma
        
        Genus Cyphocarcinus
        
        Genus Damithrax
        
        Genus Leptopisa
        
        Genus Macrocoeloma
        
        Genus Maguimithrax
        
        Genus Micippa
        
        Genus Microphrys
        
        Genus Mithraculus
        
        Genus Mithrax
        
        Genus Nemausa
        
        Genus Nonala
        
        Genus Omalacantha
        
        Species Omalacantha antillensis
        
        Species Omalacantha bicornuta
        
        Species Omalacantha garthi
        
        Species Omalacantha interrupta
        
        Genus Paranaxia
        
        Genus Petramithrax
        
        Genus Picroceroides
        
        Genus Stenocionops
        
        Genus Teleophrys
        
        Genus Thoe
      - Family Oregoniidae
    - 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

Omalacantha

Genus, Streets, 1871