list of species :
Siphnus (Notopomus) isidorei Montandon, 1894
Distribution: Penisular Malaysia.
Siphnus (Siphnus) alcides Stål, 1863 type species
Distribution: Cambodia, Vietnam.
Siphnus (Siphnus) dilatatus Walker, 1868
Distribution: Thailand.
Siphnus (Siphnus) hector Stål, 1863
Distribution: Ligor [Nakhon Si Thammarat] (Thailand).
Siphnus (Siphnus) hercules Blöte, 1945
Distribution: Borneo.
references:
Stål C. 1863