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Place
- Delaware[remove]14
- North America14
- USA14
- Iowa5
- Maquoketa River valley and adjacent bluffs, Backbone State Park, north of Dundee3
- no data3
- Dripping Springs2
- Oklahoma2
- Backbone State Park, Maquoketa River Valley and adjacent bluffs, north of Dundee1
- Backbone State Park, Maquoketa River valley and adjacent bluffs, north of Dundee1
- Crum Creek1
- Laurel1
- New Castle1
- New York1
- Newark1
- No data1
- Pennsylvania1
- Sussex1
- Townsend1
- Vlei Swamp, Franklin Township1