Epioblasma obliquata

This species was historically widespread in the Ohio River and Great Lakes drainage basins.

Like many other North American freshwater mussels, it relies on a habitat of shallow, gravelly riffle zones in larger rivers.

This oxygen-rich habitat has largely been destroyed over the past 200 years by dam construction and dredging, which caused a massive population decline.

This changed in 1994 when a few young individuals were found in Killbuck Creek, Ohio, indicating a small breeding population.

An attempt to collect young individuals was made in order to start a captive breeding program.

Only a single population has persisted into the modern day, found in Fish Creek, a tributary of the St. Joseph River in Indiana.

Basic organismal research needs to be done on the catspaw mussel if there is any hope of reintroduction to its historical ranges.

The purple nacre is characteristic of subspecies obliqua , the purple catspaw