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Thank you again, Nikita, for your suggestions and the helpful photo link.

Without insisting on Chloropidae—and of course without ruling out your hypothesis—I was wondering if Capnoptera could be a possibility, at least based on general appearance (dark body, yellow scutellum, dark wings). I realize the photo is not ideal for identification, and it’s likely not enough to go further, but I’d be very interested to know if this genus might be worth considering.

This specimen on Biodiversidad Virtual looks quite similar to mine.