A recent theoretical model predicts that the allometries of structures under sexual selection vary according to their functions in sexual interactions. Structures that are specialized for exclusive use as courtship devices, and not as weapons or threat devices, were predicted to tend to show low allometric values. Detailed observations of behavior and morphological design in Leseha vespa indicated that the sexually dimorphic abdominal tergite VIII of males functions to court females, but does not function as a weapon or in threats directed toward other males. As predicted by the theory, the allometric slope of tergite VIII length was lower than those of other body traits that were not modified for sexual interactions.

中文翻译：

---

锯蝇Leseha vespa (Hymenoptera Tenthredinidae) 性异速生长与功能的关系

最近的一个理论模型预测，在性选择下结构的异变根据它们在性互动中的功能而有所不同。专门用作求偶装置而不是武器或威胁装置的结构预计往往会显示出较低的异速生长值。对 Leseha vespa 的行为和形态设计的详细观察表明，雄性两性异形的腹部 tergite VIII 具有向雌性求爱的功能，但不能作为武器或对其他雄性的威胁。正如该理论所预测的那样，tergite VIII 长度的异速生长斜率低于未因性相互作用而改变的其他身体特征。