Micro-computed tomography of <i>Marginopora vertebralis</i> (RGM.1352105) with the shell removed, showing the interseptal space in chambers 1, 3, 7, 12, 20, 30, and 45.

Note the increase in complexity and the frequent occurrence of annular connections in chambers 20, 30, and 45. Scale bar approximately 100 μm.