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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
      - Family Gecarcinucidae
        
        Genus Adeleana
        
        Genus Arachnothelphusa
        
        Genus Arcithelphusa
        
        Genus Austrothelphusa
        
        Genus Bakousa
        
        Genus Balssiathelphusa
        
        Genus Baratha
        
        Genus Barytelphusa
        
        Genus Ceylonthelphusa
        
        Genus Clinothelphusa
        
        Genus Coccusa
        
        Genus Currothelphusa
        
        Genus Cylindrotelphusa
        
        Genus Esanthelphusa
        
        Genus Gecarcinucus
        
        Genus Geelvinkia
        
        Genus Geithusa
        
        Genus Ghatiana
        
        Genus Globitelphusa
        
        Genus Gubernatoriana
        
        Genus Guinothusa
        
        Genus Heterothelphusa
        
        Genus Holthuisana
        
        Genus Inglethelphusa
        
        Genus Irmengardia
        
        Genus Kani
        
        Genus Karkata
        
        Genus Lamella
        
        Genus Lepidothelphusa
        
        Genus Liotelphusa
        
        Genus Mahatha
        
        Genus Mainitia
        
        Genus Maydelliathelphusa
        
        Genus Mekhongthelphusa
        
        Genus Migmathelphusa
        
        Genus Nautilothelphusa
        
        Genus Niasathelphusa
        
        Genus Occulthusa
        
        Genus Oziotelphusa
        
        Genus Parathelphusa
        
        Genus Pastilla
        
        Genus Perbrinckia
        
        Genus Perithelphusa
        
        Genus Phricotelphusa
        
        Genus Pilarta
        
        Genus Rouxana
        
        Genus Sahyadriana
        
        Genus Salangathelphusa
        
        Genus Sartoriana
        
        Genus Sayamia
        
        Genus Sendleria
        
        Genus Siamthelphusa
        
        Species Siamthelphusa acutidens
        
        Species Siamthelphusa faxoni
        
        Species Siamthelphusa holthuisi
        
        Species Siamthelphusa improvisa
        
        Species Siamthelphusa nan
        
        Species Siamthelphusa paviei
        
        Species Siamthelphusa retimanus
        
        Species Siamthelphusa transversa
        
        Species Siamthelphusa variegata
        
        Genus Snaha
        
        Genus Sodhiana
        
        Genus Somanniathelphusa
        
        Genus Spiralothelphusa
        
        Genus Stygothelphusa
        
        Genus Sundathelphusa
        
        Genus Syntripsa
        
        Genus Terrathelphusa
        
        Genus Thaksinthelphusa
        
        Genus Thelphusula
        
        Genus Torhusa
        
        Genus Travancoriana
        
        Genus Vanni
        
        Genus Vela
    - 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
  - Subsection Thoracotremata
- Section Podotremata

Siamthelphusa improvisa

Author:	Lanchester, 1902
Family:	Gecarcinucidae
Synonyms:	Potamon (Parathelphusa) improvisa Siamthelphusa improvisa tweediei
WoRMS:	URL

Database contains: 11.231 species (1.101 with photo), 1.749 genera, 126 families

Last update: 10/26/2025 7:33 PM

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