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5 Specimen Results
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Order:
Equisetales
Individual/Organization:
Sternberg, G.F.
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Phylum
Pteridophyta (5)
Family
Calamitaceae (5)
Genus
Annularia (5)
Period
Pennsylvanian (5)
Formation
Mazon Creek (5)
Country
United States of America (5)
State/Province
Illinois (5)
County
Grundy (5)