superior nasal concha superior nasal concha the superior nasal concha is a small, curved plate of bone representing a medial bony process of the labyrinth of the ethmoid bone. the superior nasal concha forms the roof of the superior nasal meatus.: 692 superior nasal conchaethmoid bone from behind.lateral wall of nasal cavity, showing ethmoid bone in position. (superior nasal concha is at top of pink region.)detailsidentifierslatinconcha nasi superior, concha nasalis superiorta98a06.1.02.013ta2734fma57458anatomical terms of bone anatomy anatomical relations the superior nasal concha is situated posterosuperiorly to the middle nasal concha. it forms the superior boundary of the superior nasal meatus. superior to the superior nasal concha is the sphenoethmoidal recess where the sphenoid sinus communicates with the nasal cavity; the sphenoethmoidal recess is interposed between the superior nasal concha, and (the anterior aspect of) the body of sphenoid bone.: 692