The 850 Spider was by Bertone, and this one shares a lot with it.
( Doorlock looks a lot like it, placement of the hinges on the decklid, and the placement of the badge on the back of the decklid )
But it looks bigger and front engined.
So I'm guessing its by Bertone as well...
Styling proposal for the Dino, maybe?
I like the front end a lot better than the 850 Spider, btw....