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Keywords from Image Description:
FMIB Section of Orthocerus showing the septa ss and siphuncle sisi .jpeg check categories September Section of Orthocerus showing the septa and siphuncle si si portion of the exterior of Orthoceras annulatum Sowb Subject Orthocerus Tag Mollusks Cite book Molluscs Brachiopods Recent Brachiopods Fossil Cooke Shipley Reed London