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18 Specimen Results
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Individual/Organization:
Sternberg, G.F.
Phylum:
Pteridophyta
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Order
Equisetales (5)
Marattiales (4)
Trigonocarpales (9)
Family
Alethopteridaceae (3)
Calamitaceae (5)
Marattiaceae (4)
Medullosaceae (6)
Genus
Alethopteris (3)
Annularia (5)
Codonotheca (1)
Neuropteris (5)
Pecopteris (4)
Period
Pennsylvanian (17)
Formation
Mazon Creek (18)
Country
United States of America (18)
State/Province
Illinois (18)
County
Grundy (18)