Chevone B I, Richards A G
Tissue Cell. 1977;9(2):241-54. doi: 10.1016/0040-8166(77)90019-2.
The terminal abdominal segments of male Aedes aegypti rotate 180 degrees within 24 hr after adult emergence, rotation occurring in the intersegmental membrane between abdominal segments VII and VIII. The ultrastructure of this rotating membrane is compared with non-rotating intersegmental membranes at different developmental stages. The deposition of cuticle in both the rotating and non-rotating intersegments appears ultrastructurally similar, and follows the sequential pattern described for the insects. Shortly after adult emergence, however, disruptive changes occur in the membrane cuticle that are more pronounced in non-rotating intersegments. This disruption occurs initially 1 hr after adult emergence and becomes maximal within 3 hr. Disruption appears to occur by the addition of fluid to the cuticle and results in a ten-fold increase in cuticle thickness in non-rotating intersegments but only a two-fold increase in thickness in the rotating intersement. While in the disrupted condition, the non-rotating intersegmental membranes become extensively folded whereas the cuticle in the rotating intersegment becomes stretched. During rotation, strain forces in the rotating intersegment result in a reorientation of microfibers in the cuticle from parabolic to parallel. This reorientation is presumably brought about by plastic flow.
成年埃及伊蚊雄性腹部末端节段在羽化后24小时内旋转180度，旋转发生在腹部第七和第八节段之间的节间膜处。将该旋转膜的超微结构与不同发育阶段的非旋转节间膜进行比较。旋转节间膜和非旋转节间膜中角质层的沉积在超微结构上看起来相似，并遵循昆虫所描述的顺序模式。然而，在成年羽化后不久，膜角质层会出现破坏性变化，在非旋转节间膜中更为明显。这种破坏最初发生在成年羽化后1小时，并在3小时内达到最大值。破坏似乎是由于角质层中添加了液体导致的，这使得非旋转节间膜中的角质层厚度增加了十倍，而旋转节间膜中的厚度仅增加了两倍。在处于破坏状态时，非旋转节间膜会广泛折叠，而旋转节间膜中的角质层会被拉伸。在旋转过程中，旋转节间膜中的应变力导致角质层中的微纤维从抛物线状重新定向为平行状。这种重新定向大概是由塑性流动引起的。
