sphenosquamosal suture sphenosquamosal suture the sphenosquamosal suture is a cranial suture between the sphenoid bone and the squama of the temporal bone. sphenosquamosal suturesphenosquamosal suture (red)side view of the skulldetailsidentifierslatinsutura sphenosquamosata98a03.1.02.008ta21582fma52944anatomical terminology additional images left zygomatic bone in situ base of the skull. upper surface.