Team discovers a new invasive clam in the US

Source: ScienceDaily

They found it in the Illinois River near the city of Marseilles, Ill., about 80 miles west of Lake Michigan — a strange entry point for an invasive Asian clam. The scientists who found it have no idea how it got there. But the discovery — along with genetic tests that confirm its uniqueness — means that a new species or ‘form’ of invasive clam has made its official debut in North America.

https://www.sciencedaily.com/releases/2017/05/170501112522.htm