Fig. 5. A in Conellae, enigmatic structures on cephalopod shells -shapes, distribution, and formation

Fig. 5. A very large single sediment-filled conella on the phosphatized fragment of body chamber of Late Volgian macroconch of Craspedites sp. (GIN MPC 4/15) from Kuntsevo locality in the Moscow region, Russia. SEM image of conella showing the minute surface structure (A1), general view of the specimen (A2).