06 Gymnophyllum wardi Mature Specimen 01 Domed top, Fused Septa.jpg
This specimen of Gymnophyllum wardi appears to be mature, having a broad, smooth central dome on top and fused septa that are visible mainly near the periphery. This species grew by spreading horizontally, a process that often left conspicuous growth lines on the bottom surface of the corallite.
From the album:
Pennsylvanian Fossils of Northeast Oklahoma
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