Key to the species of Physatocheila from Korean Peninsula

1. Paranota wide, maximal width from anterolateral margin to inner margin much more than minimal width between paranota.. ................................................................................................... 2

- Paranota narrow, maximal width from anterolateral margin to inner margin as same as or less than minimal width between paranota............................................................................................ 3

2. Inner margin of paranota reaching medial carina............................................. Physatocheila fieberi

- Inner margin of paranota not reaching medial carina..................................... Physatocheila distinguenda

3. Inner margin of paranota clearly reaching anterior margin of lateral carina........................................ 4

- Inner margin of paranota clearly not reaching lateral carina............................... Physatocheila smreczynskii

4. Costal area of hemelytra with two rows of areolae throughout; pygophore with tubercles in ventral view; inner margin of paramere rounded............................................................. Physatocheila koreaensis sp. nov.

- Costal area of hemelytra with two or three rows of areolae in basal part, four or five rows in middle part, and two rows in apical part; pygophore without tubercles in ventral view; inner margin of paramere almost straight......... Physatocheila orientis