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20 Specimen Results
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County:
Grundy
Individual/Organization:
Sternberg, G.F.
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Phylum
Lycophyta (1)
Pteridophyta (18)
Order
Equisetales (5)
Lepidodendrales (1)
Marattiales (4)
Trigonocarpales (9)
Family
Alethopteridaceae (3)
Calamitaceae (5)
Lepidodendraceae (1)
Marattiaceae (4)
Medullosaceae (6)
Genus
Alethopteris (3)
Annularia (5)
Codonotheca (1)
Lepidodendron (1)
Neuropteris (5)
Pecopteris (4)
has media
Has media (1)
Has no media (19)
Individual/Organization
Bures, J. (1)
Period
Pennsylvanian (18)
Formation
Mazon Creek (20)
Country
United States of America (20)
State/Province
Illinois (20)