Key to the species of the genus Paradoxecia Hampson, 1919 based on external characters

1. Tergite 1 yellow entirely [tergites 2–6 blackish grey; tergites 4 and 5 each with a yellow stripe posteriorly; sternites 1–5 pale yellow; sternites 6 and 7 mixed with a few grey scales]............................................... P. radiata *

- Tergite 1 black or dark brown............................................................................ 2

2. Tegulae orange [tergites 2–7 with broad brick-orange stripes; sternites 2–7 each with a narrow brick-orange stripe; anal tuft brick-orange].................................................................................. P. chura

- Tegulae black or dark brown............................................................................ 3

3. Patagia with a pair of yellow spots posterior-laterally......................................................... 4

- Patagia without spots posterior-laterally................................................................... 6

4. Tergite 1 yellow laterally............................................................................... 5

- Tergite 1 without yellow scales laterally [tergite 4 with a small orange spot anterior-laterally on each side; sternites entirely dark brown]................................................................................... P. vietnamica *