physella ancillaria | | USA: Delaware River near Easton, Pennsylvania | | 164430678 |
physella ancillaria | | USA: Delaware River near Easton, Pennsylvania | | 164430676 |
physella ancillaria | | USA: Delaware River near Easton, Pennsylvania | | 164430591 |
physella ancillaria | | USA: Delaware River near Easton, Pennsylvania | | 164430590 |