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52 Specimen Results
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County:
Grundy
Period:
Pennsylvanian
Filter by
Phylum
Pteridophyta (34)
Order
Equisetales (9)
Marattiales (12)
Trigonocarpales (13)
Family
Alethopteridaceae (5)
Calamitaceae (9)
Marattiaceae (12)
Medullosaceae (8)
Genus
Alethopteris (5)
Annularia (9)
Codonotheca (2)
Neuropteris (6)
Pecopteris (12)
has media
Has media (1)
Has no media (51)
Individual/Organization
Sternberg, G.F. (18)
Mrs. Danforth, F. (34)
Bures, J. (1)
Period
Pennsylvanian (53)
Formation
Mazon Creek (53)
Country
United States of America (52)
State/Province
Illinois (52)