From supra- + cephalic.
supracephalic (not comparable)
- (anatomy) overhead; above the head.
1989, Jonathan A. Campbell, William W. Lamar, The venomous reptiles of Latin America, page 90:There is a typical complement of 9 large supracephalic head scales that includes 2 internasals, 2 prefrontals, 2 supraoculars, 1 frontal, and 2 parietals.