Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Asterothca squamosa, Pecopteris clintoni, P. ultraminuta and Senftenbergia pennaeformis, page 56.
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Asterotheca squamosa.
Pecopteris clintoni.
Pecopteris ultraminuta;
new species, paratype.
Senftenbergia pennaeformis.
Asterotheca squamosa, GL photographs and sketches, page 56
Pecopteris clintoni, GL photograph, page 56
Pecopteris ultraminuta, new species, paratype, GL photograph and sketch, page 56
Senftenbergia pennaeformis, GL photograph, page 56