It consists of a single sclerite situated between the coxa, opposite the carapace. The body of the sclerite articulates laterally with the second axillary. The first axillary sclerite (lAx) is the anterior hinge plate of the wing base. Three large sclerite protruded from the front of its head. The fourth axillary sclerite is not a constant element of the wing base. The sclerite posterior to the suture is called the epimiron (serially, the mesepimiron and metepimiron). These tymbals are located on the anterior part of the tegulae underneath the patagium sclerite. Some insects bear a sclerite in the pleural area called a laterotergite. The central cavity of the "Siphogonuchites" sclerite is simple, with no lateral chambers attached. With this reversal, the female is able to discriminate between males' gentalic sclerite. The Fourth Axillary sclerite is not a constant element of the wing base. A sclerite (Greek , ', meaning "hard") is a hardened body part. The parastomal bars are long, thin structures, fused to the tentoropharyngeal sclerite.