Poecilasthena subpurpureata is a species of moth of the family Geometridae.

It was first described by Francis Walker in 1863 and it is endemic to New Zealand.

[2] A synomic species, Astheniodes polycymaria (the two species have almost identical male genitalia),[3] has a holotype that was recorded by George Hampson as being from India, which, as Dayong Xue and Malcolm J. Scoble point out in their paper, would be a very strange distribution pattern.

[3] Louis Beethoven Prout reasonably calls this an error in his 1926 paper.

This Asthenini moth related article is a stub.