frontoethmoidal suture frontoethmoidal suture the frontoethmoidal suture is the suture between the ethmoid bone and the frontal bone. frontoethmoidal suturebase of the skull. upper surface. (frontoethmoidal suture is not labeled, but is visible at top, between frontal bone in blue, and ethmoid bone in white.)left zygomatic bone in situ.detailsidentifierslatinsutura frontoethmoidalista98a03.1.02.014ta21589fma52949anatomical terminology it is located in the anterior cranial fossa.