Subject: Balloon spider?
Geographic location of the bug: Sao Paulo, Brazil (-22.79381, -44.37906)
Time: 10:14 AM EDT
Your letter to the bugman: Hi,
I found this beautiful spider in Sao Paulo, Brazil, on 2012, 02/19. I would appreciate an identification.
How you want your letter signed: Luis
This is a pretty Orbweaver in the family Araneidae. Our initial internet search did not turn up any visual matches, and we went through the Insetologia archives in an attempt to identify this species, but unsuccessfully.
Update: Thanks to a comment from Cesar Crash, we now know that this is an Orbweaver in the genus Bertrana, and we verified that on Project Noah.
WTB is the best!