alternative definition added over 14 years ago by Istvan Miko
One of a pair of muscles inserted on the proximal ends of the lateral arms of the sitophore; they arise on the frons, between the labral retractors and insert on the mesal surface of the lateral arms.
Reference: Vilhelmsen, L. 1996. The preoral cavity of lower Hymenoptera (Insecta): comparative morphology and phylogenetic significance. Zoologica Scripta 25:143-170.
Cross reference:
None provided.