What kind of insect is this?
I found it in my work room.
I live in the city of São José dos Campos, São Paulo, Brazil
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Based on the roundness of your specimens, I'd suspect that they represent possibly the 1st or 2nd instar development stage.
I am unsure of the species currently, though I suspect this is an image of the adult (wrongfully labeled as a "bed bug" at its source):
I will dig into the Brazilian fauna to see if I can get you a species...