A superb and complete, large, adult internal mould beautifully preserved on one side and the venter with the other side moderately abraided with matrix in th eumbilicus. A highly evolute form with typical crioceratid coiling showing the last half of the whorl (which is body chamber) not in touch with the phragmocone. Though the sutures are not particularly clear, the phragmocone, last sutures and body chamber can clearly be distinguished. Towards the end of the phragmocone, large costae gradually appear on the flank, and on the body chamber. 7 of the 8 costae become enormously elevated, thin and sharp, smoothed out over the venter and separated by wide concave areas. From the Isle of Wight.
Size: 390 mm in diameter
Size: 390 mm in diameter