Coming soon to a nose near you?
Researchers say the leech can enter the body orifices of people and animals to attach itself to mucous membranes.
They have called the new blood-sucking species Tyrannobdella rex which means tyrant leech king.
The creature lives in the remote parts of the Upper Amazon and has a “particularly unpleasant habit of infesting humans”, the scientists say.
The zoologist, Dr Mark Siddall, from the American Museum of Natural History in New York, was quick to recognise 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.