Hoplodrina implacata (Wileman & West, 1929)

Wu, Shipher & Owada, Mamoru, 2018, Revision of the Hoplodrina implacata group (Lepidoptera: Noctuidae: Noctuinae: Caradrinini) of Taiwan, with descriptions of four new species, Zootaxa 4455 (3), pp. 571-581 : 572

Key to the species of the H. implacata complex in Taiwan

1a. Forewing coloration brown in fresh; uncus flattened laterally at apical part; valva strongly narrowed at subapical part, apical part wide digitiform...................................................................... H. bunun sp. nov.

1b. Forewing coloration brown, silver brown or pale greyish in fresh; uncus slightly swollen at apical part; valva with costal and ventral margins nearly parallel or gradually widen towards subapical part......................................... 2

2a. Forewing coloration brown in fresh; valva with a distinct ventral protrusion at subapical part........ H. kononenkoi sp. nov.

2b. Forewing coloration silver brown or pale greyish in fresh; valva without a ventral protrusion at subapical................ 3

3a. Harpe curved medially; apical part of juxta concave; saccus V-shaped with acute apex..................... H. implacata

3b. Harpe straight; apical part of juxta rounded; saccus V-shaped without acute apex................................... 4

4a. Forewing reniform and orbicular stigmas prominent; submarginal line linear; uncus slender; valva gradually widen towards subapical part; carina with two small conical spines.......................................... H. cienensis sp. nov.

4b. Forewing reniform and orbicular stigmas indistinguishable; submarginal line dentate; uncus stout; valva with ventral margin slightly concave medially; carina without spine............................................... H. obscura sp. nov.