Rema costimacula is a species of moth of the family Erebidae first described by Achille Guenée in 1852. It is found in the north-eastern Himalayas, Thailand, Peninsular Malaysia, Sumatra, Borneo and Sulawesi.
The larvae feed on Amphicarpaea species.
Subspecies Rema costimacula costimacula Rema costimacula triangulata Walker, 1865 (Himalayas)
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