| The skulls of Devonian lungfish have a tessera of small superficial bones, fused to an ossified chondrocranium. |
| The stingray BUC clusters are located near to the rostral chondrocranium and below the eye. |
| Behind, the primary skull or chondrocranium gives off two occipal or rear skull plates. |
| Its chondrocranium would have had a blockier and more robust appearance than the great white. |
| In the sturgeon the chondrocranium is ensheathed by numerous membrane bones, but cartilage bones are absent. |
| These two conditions result from the inability of the dermal bones to fill at the proper period the gaps in the chondrocranium. |
