Drepanogynis protactosema is a species of moth of the family Geometridae. It is found in North & East Madagascar.afromoths
The wingspan of this species is 32–34 mm. The forewings are rather elongated, pallid purple or more violaceous, with quite sparse blackish irroration. The costal edge is narrowly reddish.Prout, L. B. 1932e. New exotic Geometridae. – Novitates Zoologicae 38(1):103–126 – page 109-110
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