Figure 7.

Schematic overview of the phenotype of stony mutant. Dysfunctional BmorCPR2 leads to cuticle extend blockage, decrease in tensile property, and abnormal differentiation of various parts in the segment cuticle, resulting in significant increase of the internal pressure of the body cavity and pushing out of the increscent and variant intersegmental fold. These factors lead to tightness and hardness, abnormal body shape, and marked decrease in adaptability of larvae. in, internode; im-f, intersegmental fold. The green region shows midgut content. Blue arrows indicate internal pressure of the body cavity, and the solid purple arrow represents telescopic movement between segments. The dotted purple arrow represents the deficiency of telescopic movement between segments. Red solid and dotted circular arrows represent normal crooking and deficiency of crooking capacity of the ventral side, respectively.