Sella turcica is the depression in the sphenoid bone of the skull. Sella turcica is also known as hypophysial fossa. It is located behind the chiasmatic groove and tuberculum sellae of the sphenoid bone which hold the pituitary gland. Solution Sella turcica is the depression in the sphenoid bone of the skull. Sella turcica is also known as hypophysial fossa. It is located behind the chiasmatic groove and tuberculum sellae of the sphenoid bone which hold the pituitary gland..