Bedbugs, Cimex lectularius, have re‐gained their status as economically important insects in many parts of the world and, consequently, re‐attracted research into their biology. Standardizing age, feeding and mating status of experimental animals requires easy and reliable identification of the nymphal sex. Here, we show the angle of the pointedness of the abdomen to be a reliable sex marker in nymphal stage 5, as well as the shape of the 9th sternite, allowing rapid nymph sorting by sex. The sexual dimorphism was driven by males, not females, departing from the larval growth trajectory.

中文翻译：

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臭虫若虫的性别差异，Cimex lectularius

臭虫，Cimex lectularius，在世界许多地方重新获得了作为经济上重要昆虫的地位，因此重新吸引了对其生物学的研究。标准化实验动物的年龄、喂养和交配状态需要简单可靠地识别若虫性别。在这里，我们展示了腹部尖尖的角度是若虫第 5 阶段的可靠性别标记，以及第 9 块尾骨的形状，允许按性别快速分类若虫。性别二态性是由雄性而非雌性驱动的，偏离了幼虫的生长轨迹。