Pirkimerus Distant, 1903b: 21. Type species by original designation: Pirkimerus sesquipedalis Distant, 1903, Burma, India.
Ischnomorphus Hidaka, 1961a: 255 (syn. J.A. Slater & Ahmad, 1965b: 313). Type species by monotypy: Ischnomorphus japonicus Hidaka, 1961.