Key to the species of Drepanura from Australia

1 Abd. III with 2 medially on each side (a2, m)..................................................... liuae sp. nov.

- Abd. III with 1 medially on each side (m3)................................................................ 2

2 Abd. II with more than 10 macrochaetae on each side.......................................... polychaeta sp. nov.

- Abd. II with 3−4 central macrochaetae on each side......................................................... 3

3 Abd. I with 9−10 macrochaetae on each side................................................................ 4

- Abd. I with 3−6 macrochaetae on each side................................................................. 5

4 Body with five longitudinal stripes............................................... cinquilineata Womersley, 1934

- Body without five longitudinal stripes............................................... albocoerulea (Schött, 1917)

5 Abd. I with 6 macrochaetae on each side, whole body with blue pigment....................... cobaltina (Schött, 1917)

- Abd. I with 3−4 macrochaetae on each side, body not entirely pigmented blue.................................... 6

6 Abd. IV without cross band......................................................... citricola Womersley, 1934

- Abd. IV with 2 cross bands...................................................... coeruleopicta (Schött, 1917)