Key to the Tautoneura species of the Korean Peninsula

1. Pygofer lobe with dorsal and ventral process................................................................ 2

- Pygofer lobe with only dorsal process..................................................................... 3

2. Aedeagus with pair of branched processes, style apex with three projections (Fig. 20, 21)........ T. tricolor Anufriev, 1969

- Aedeagus with pair of processes and appendage, style apex with one projection (Fig. 13).. T. japonica (Dworakowska, 1972)

3. Abdominal apodemes extended to middle of sternite IV and aedeagus with one process at apex (Fig. 6, 10).............................................................................................. T. mori (Matsumura, 1906)

- Abdominal apodemes not extended to sternite IV and aedeagus with pair of process at lateral margin (Fig. 27, 31)............................................................................................. T. polymitusa sp. nov.