Key to adult females of Aspidiella species in Japan

1. Third pygidial lobe (L 3) reduced to small projection. Apices of median lobes truncate. Plates absent from lateral to third lobe........................................................................... A. phragmitis (Takahashi, 1931)

- Third pygidial lobe (L 3) relatively well-developed and easily recognisable. Apices of median lobes mostly rounded. Plates present lateral to third lobe.............................................................. A. kijimuna sp. nov.