Ok i´ve found out myself, this would be a Cicada, i thought about that one, never knew they could get that big.

Yep, it's a cicada, and some species do get quite large(you'd think they were a foot long based on the amount of noise they can generate). You are also correct in your assessment that it has outlived its time. Depending on the species, cicadas spend most of their lives, 13-17 YEARS, underground as nymphs. They emerge upon maturing and moult into the adult form you see here, but only live a few days, usually less than a week, afterwards, just long enough to mate and produce eggs, then they die.

We call it a Black Prince cicada in Oz. Young children give them nicknames and call the greens ones Green Grocers, also the yellow ones -Yellow Mondays. For kids who collect them , the black prince was the prize catch as it was the rarest, the green grocer being the most common.