This unhappy fellow is a tarantula that has been colonized by cordyceps, a fungus that "invades and eventually replaces the host tissue." Paging Mr Mieville, your subconscious mind is manifesting again.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.