General gut morphology, gut pH and presence of peritrophic
membrane in S. levis larvae
The gut of the larvae is composed of a very short foregut, a large
midgut that is anteriorly dilated and a medium-size hindgut
(Fig. 1). The midgut is made up of a simple linear tube –
ventriculus. The ventriculus is 1.58 0.08 cm long and has a
decreasing diameter from its anterior region (0.20) to the posterior