Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Asolanus  camptotaenia and Omphalophloios cyclostigma, page 43.
Asolanus camptotaenia, page 43. Omphalophloios cyclostigma, page 43.
Asolanus comptotaenia outer surface
Asolanus comptotaenia inner bark surface of tree
Asolanus comptotaenia
Omphalophloios cyclostigma inner surface
Omphalophloios cyclostigma
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