In the animal kingdom, macroscopic variations in size, color, and even hairiness are frequently observed between male and female, making the sex of various species easy to discern. In the case of insects, similar variances also exist. While direct observation is a quick and efficient way to differentiate between sexes, there are also variations which are unseen to the naked eye and occur on a micro- or nanoscopic scale. Sometimes, these micro/nanoscopic variations can lead to significant variations in surface properties as a function of sex. Such is the case for the Mecynorhina polyphemus confluens (Kraatz, 1890). In this work, we characterize these micro- and nanoscale differences, and describe their impact on the surface properties (e.g. wettability). It is found that water interacts quite differently with the surface of the cuticle of Mecynorhina polyphenus confluens, depending on the specimen sex. On a female, water spreads readily across the elytra indicating hydrophilic behavior. However, on the surface of the male elytra, strong hydrophobicity is observed. Microscopic observations reveal differences in microscale surface morphology across the male and female cuticle. These observations contribute to a better, global understanding of the wettability behavior observed on M. polyphemus confluens.

中文翻译：

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微型和纳米观察到的聚对蓝藻（Mecynorhina polyphemus confluens）（Kraatz，1890）（鞘翅目、,科，Goliathini）有性二态性及其对表面润湿性的影响。

在动物界中，经常在雄性和雌性之间观察到大小，颜色甚至毛羽的宏观变化，这使得各种物种的性别易于辨别。就昆虫而言，也存在类似的差异。虽然直接观察是区分性别的一种快速而有效的方法，但也存在一些肉眼看不见的变化，这些变化发生在微观或纳米尺度上。有时，这些微观/纳米变化会导致表面性质随性别的显着变化。Mecynorhina polyphemus confluens就是这种情况（Kraatz，1890年）。在这项工作中，我们表征了这些微米级和纳米级的差异，并描述了它们对表面性能（如润湿性）的影响。已经发现，水与Mecynorhina polyphenus conphenes的表皮表面的相互作用完全不同，这取决于标本的性别。在雌性上，水很容易在鞘翅上扩散，表明亲水行为。然而，在雄性鞘翅的表面上，观察到强疏水性。显微镜观察揭示了男性和女性表皮的微观表面形态差异。这些观察结果有助于更好地，整体地了解在多毛支原体融合菌上观察到的润湿性行为。显微镜观察揭示了男性和女性表皮的微观表面形态差异。这些观察结果有助于更好地，整体地了解在M. polyphemus confluens上观察到的润湿行为。显微镜观察揭示了男性和女性表皮的微观表面形态差异。这些观察结果有助于更好地，整体地了解在多毛支原体融合菌上观察到的润湿性行为。