These fossae and all the cranium posterior to them are missing.
On the cranial surface of the pinna elevations correspond to the concha and to the fossae 792 of the helix and antihelix.
The distance between the temporal ridges about four-fifths the width of the cranium at the fossae.
fossa fos·sa (fŏs'ə)
n. pl. fos·sae (fŏs'ē')
A small longitudinal cavity or depression, as in a bone.