US Counties within Pennsylvania in which the clubshell, Entire Range; Except where listed as Experimental Populations is known to or is believed to occur:

State County
Pennsylvania Armstrong
Pennsylvania Butler
Pennsylvania Clarion
Pennsylvania Crawford
Pennsylvania Erie
Pennsylvania Forest
Pennsylvania Mercer
Pennsylvania Venango
Pennsylvania Warren

This report contains Counties in which this species is known to or is believed to occur. If you are looking for the Section 7 range (for Section 7 Consultations), please visit the IPaC application.