Sayamia

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Cladus: Pancrustacea
Superclassis: Multicrustacea
Classis: Malacostraca
Subclassis: Eumalacostraca
Superordo: Eucarida
Ordo: Decapoda
Subordo: Pleocyemata
Infraordo: Brachyura
Sectio: Eubrachyura
Subsectio: Heterotremata
Superfamilia: Gecarcinucoidea

Familia: Parathelphusidae
Genus: Sayamia
Species (5): S. bangkokensis – S. germaini – S. maehongsonensis – S. melanodactylus – S. sexpunctata
Name
Sayamia Naiyanetr, 1994

Sayamia[1] is a genus of freshwater crabs, found in South-East Asia. Three species are included on the list of least concern (lc) arthropods, but S. melanodactylus is endangered.
Species

Sayamia bangkokensis (Naiyanetr, 1982): Thailand (lc)
Sayamia germaini (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc)
Sayamia maehongsonensis (Naiyanetr, 1987): Thailand (VU)
Sayamia melanodactylus Ng, 1997: Thailand (EN)
Sayamia sexpunctata (Lanchester, 1906): N. peninsular Malaysia (lc)

References

"WoRMS - World Register of Marine Species - Sayamia Naiyanetr, 1994". marinespecies.org. Retrieved 19 August 2017.