In addition, two paired muscles were attached to the sclerotised
lateral wall of the cibarium, suspending it inside the head capsule.
Originating laterally on the frons, m. fronto-cibarialis (mfc)
attached to a dorsal tendon protracting from the cibarium ledge,
lateral to the pharyngeal pump. Furthermore, the musculus
tentorio-cibarialis (mtc) originated on the tentorial arm and
extended obliquely to its insertion on the cibarium (Fig. 5E, F).
These cibarial retractor and protractor muscles hold the pump
stationary by working antagonistically against the massive dilator
muscles