Plate in front of and between covering case of pedicel (Fig.3a.jpg), usually carrying frontal setae and often cephalic tubercles.
When the adult ecdyses, the cephalothorax of the pupal cuticle splits along a Y-shaped mid-dorsal suture, releasing a triangular flap over the head, the frontal apotome, which is often folded forwards in mounts.

Alternative forms for frontal apotome : FA, frontal apotomes.