The Allegheny River basin holds globally significant populations of four species of mussels federally listed as endangered. They are northern riffleshell (Epioblasma torulosa rangiana), clubshell (Pleurobema clava), rayed bean (Villosa fabalis) and snuffbox (Epioblasma triquetra).
Surveys in the upper Allegheny River basin in New York and Pennsylvania have found populations of these species in the past, but portions of the mainstem Allegheny River and its tributaries remain un-surveyed or have incomplete surveys -- an obstacle to truly achieving recovery.
|Diver looking for riffleshell and clubshell mussels. Credit: Jeremy Tiemann Il/Natural History Survey|