Giant scale insect

Thank you, Martin, for this ID.

Muito fascinante!

Amazing! Thanks a lot, Martin. I'll try to find more info here. I thought of tortoise beetles because the overall shape of this one looks very much like that of TB larvae, minus the "spikes": http://www.projectnoah.org/spottings/821...

They come from Australia and here's an Asian one. I don't know if they are supposed to come from Brazil but you probably have everything. They are female

http://www.flickr.com/photos/itchydogima...

When they have no wings you easily think of a nymph or larva.
This one has grown up already
GIANT SCALE INSECT
http://www.whatsthatbug.com/2010/03/16/g...