3.2.1. Cibarial pump
The short, paired musculus labro-epipharyngealis (mle) at the
base of the proboscis controlled the cibarial valve. In addition, m.
clypeo-cibarialis (mcc) originated on the clypeus and inserted on
the anterior cibarial wall. This massive paired muscle was responsible for operating the cibarial pump (Fig. 5A, B).