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13 Specimen Results
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Formation:
Mazon Creek
Family:
Marattiaceae
Filter by
Phylum
Pteridophyta (13)
Order
Marattiales (13)
Genus
Pecopteris (13)
Individual/Organization
Sternberg, G.F. (4)
Mrs. Danforth, F. (9)
Period
Pennsylvanian (13)
Formation
Mazon Creek (14)
Country
United States of America (13)
State/Province
Illinois (13)
County
Grundy (13)