| Janvier agrees that gills, and perhaps the external branchial skeleton, are primitive to the chordates. |
| Due to the reduction of the hyoid and branchial arches, no other means than the suction flow seems to be available for this function. |
| The ventral branchial arch segments of placoderms are so poorly known that nothing useful can be said. |
| The branchial basket was braced against the body wall and unjointed, as in lampreys. |
| Could it be that the parathyroid is also derived from a branchial arch, and is therefore homologous with the gills of fish? |
| The lenticular process is actually derived from mesenchyme attributed to the second branchial. |
