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Emesis sp.
Large bodied moth or butterfly
Riodinidae, Emesis sp., but it is not possible to get closer than Emesis sp., might be Emesis mandana, which is quite common, but it is not serious to call this one Mandana.
The Common Castor is not found in Brazil.
Perhaps a Lucius Metalmark? (Metacharis lucius)
http://www.learnaboutbutterflies.com/Ama...