Gecarcinucidae Rathbun, 1904
Siamthelphusa acutidens Ng & Naiyanetr, 1997
Siamthelphusa faxoni Ng & Naiyanetr, 1997
Siamthelphusa holthuisi Naiyanetr & Ng, 1990
Siamthelphusa improvisa (Lanchester, 1902)
Siamthelphusa nan Ng & Naiyanetr, 1997
Siamthelphusa paviei (De Man, 1898)
Siamthelphusa retimanus Ng & Naiyanetr, 1997
Siamthelphusa transversa Ng & Naiyanetr, 1997
Siamthelphusa variegata Ng & Naiyanetr, 1997
