| All specimens are bryozoan colonies called scientifically, genus Rhombopora. Rhombopora bryozoans in top image are from the upper Pennsylvanian Lecompton Limestone, Shawnee Group, Virgilian Stage--303 to 301 million years old. Specimens in bottom image are from the upper Pennsylvanian Auburn Shale, Wabaunsee Group, Virgilian Stage--301 to 299 million years old. |