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
      - Family Potamidae
      - Family Potamonautidae
        
        Genus Afrithelphusa
        
        Genus Boreathelphusa
        
        Genus Deckenia
        
        Genus Erimetopus
        
        Genus Foza
        
        Genus Glabrithelphusa
        
        Genus Globonautes
        
        Genus Hydrothelphusa
        
        Genus Liberonautes
        
        Genus Louisea
        
        Genus Madagapotamon
        
        Genus Malagasya
        
        Genus Marojejy
        
        Genus Platythelphusa
        
        Genus Potamonautes
        
        Genus Potamonemus
        
        Genus Seychellum
        
        Species Seychellum alluaudi
        
        Species Seychellum mahefregate
        
        Species Seychellum silhouette
        
        Genus Skelosophusa
        
        Genus Sudanonautes
    - Superfamily Pseudothelphusoidea
    - Superfamily Pseudozioidea
    - Superfamily Retroplumoidea
    - Superfamily Trapezioidea
    - Superfamily Trichodactyloidea
    - Superfamily Trichopeltarioidea
    - Superfamily Xanthoidea
  - Subsection Thoracotremata
- Section Podotremata

Seychellum

Genus, Ng, Števcic & Pretzmann, 1995