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One latticed cortical shell and one medullary shell represented by an irregular formation of anastomosing centripetal bars arising from the cortical shell (may be missing in poorly preserved materials; not focused in specimen illustrated). Pores on outer shell irregular in shape and size, generally subcircular. Surface rough or thorny. Diameter of cortical shell: 150-270 µm.

Ref.: Benson (1966).

Carposphaera acanthophora