wingspan : 27 mm
this Mesosemia looks like the type of machaera machaera, Yasuni.
not far from Yasuni, just North and West, flies Mesosemia machaera dealbata.
https://www.noreste.eu/en/fiche-papillon/021-Riodinidae/003-Riodininae/001-Mesosemiini/003-Mesosemia/193-machaera/dealbata
