The Cylindrical Papershell is a relatively short-lived (10 years) freshwater mussel that was formerly documented in most rivers of northern Kansas.  It is a thin-shelled, straw-colored mussel that can measure 3.5 inches in length.  Currently, it is found in limited reaches of the Smoky Hill and Saline rivers.  Mussel larvae (glochidia) require attachment to a fish host to metamorphose to the juvenile stage before dropping off.  The Cylindrical Papershell has hooked glochidia that can attach to the fins of several host fish species.  Once attached, glochidia metamorphose to the juvenile stage before dropping off.   Intermittent river flow and elevated water temperatures are identified threats to the Cylindrical Papershell populations in Kansas.