The Tyrannobdella Rex leech has a preference for living up noses.
The creature was first discovered in 2007 in Peru when a specimen was plucked from the nose of a girl who had been bathing in a river.
The creature lives in the remote parts of the Upper Amazon and has a particularly unpleasant habit of infesting humans.
Dr Mark Siddall recognised it as a new species. He said it had some very unusual features, including just one single jaw, eight very large teeth and extremely small genitalia.
They have called the new blood-sucking species Tyrannobdella rex which means tyrant leech king.