It is shaped like a seashell and found on the posterosuperior part of the lateral nasal wall.
[2] It lies on the medial surface of the labyrinth of ethmoid above the superior nasal concha.
It is often no more than a small, simple crest protruding from the nasal wall.
The space below and the fissure lateral to the concha are known as the supreme nasal meatus.
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