In article ,
wrote...

do any of you knows what kind of seed is this?

http://www.geocities.com/artyard/piante

It's from a tropical legume, a _Mucuna_ species [there are several
species with similar seeds] It's one of the "sea beans":

http://www.seabean.com/guide/Mucuna_sloanei/
http://waynesword.palomar.edu/mucuna.htm

The plant is a large woody tropical climber. Mucuna seeds are
recognizable by their odd hamburger-in-a-bun appearance caused by
the long wrap-around hilum.

cheers