[Taxacom] Yellow spider in Brazil

[Maarten Christenhusz]

Dear all,

A few days ago I found this bright yellow spider along a small road in the coastal whitesand forests (restinga), near Bertioga. São Paulo state, Brazil. 
I think the animal is amain. If anyone knows what it is, a name is certainly appreciated.
You can see the picture on:
http://bp2.blogger.com/_CPiJHvBeClM/R8xfeQIHnuI/AAAAAAAAADc/OsVw0NzqIQw/s1600-h/Dsc05037.jpg

Kind regards,
Maarten Christenhusz
Turku University, Finland