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AN ANATOMICALLY PRESERVED POTONIEA WITH IN SITU SPORES FROM THE PENNSYLVANIAN OF ILLINOIS
Author(s) -
Stidd Benton M.
Publication year - 1978
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1978.tb06125.x
Subject(s) - pennsylvanian , sporangium , biology , pollen , sporopollenin , spore , paleontology , aperture (computer memory) , anatomy , botany , structural engineering , structural basin , engineering
Specimens preserved in coal balls collected from the Herrin (No. 6) Coal in Illinois reveal the internal structure of the pteridosperm pollen organ long known as the compression fossil, Potoniea . Cylindrical sporangia are concentrically arranged in a campanulate body and the end of each sporangium projects freely from the distal face of the organ. Pollen is trilete and without a distal germinal aperture. The exine is structureless and has a separable, perine‐like layer adorned with orbicules.