ABSTRACT Research data of the microstructure and surface morphology of insect wings have been used to help design micro air vehicles (MAV) and coating materials. The present study aimed to examine the microstructure and morphology of the hind wings of Cyrtotrachelus buqueti using inverted fluorescence microscopy (IFM), scanning electron microscopy (SEM), and a mechanical testing system. IFM was used to investigate the distribution of resilin in the hind wing, and SEM was performed to assess the functional characteristics and cross-sectional microstructure of the wings. Moreover, mechanical properties regarding the intersecting location of folding lines and the bending zone (BZ) were examined. Resilin, a rubber-like protein, was found in several mobile joints and in veins walls that are connected to the wing membranes. Taken together, structural data, unfolding motions, and results of tensile testing suggest two conclusions on resilin in the hind wing of C. buqueti: firstly, the resilin distribution is likely associated with specific folding mechanisms of the hind wings, and secondly, resilin occurs at positions where additional elasticity is needed, such as in the bending zone, in order to prevent structural damage during repeated folding and unfolding of the hind wings. The functional significance of resilin joints may shed light on the evolutionary relationship between morphological and structural hind wing properties.

中文翻译：

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竹象甲 Cyrtotrachelus buqueti（鞘翅目，仙茅科）后翅的功能形态和结构特征

摘要昆虫翅膀的微观结构和表面形态的研究数据已被用于帮助设计微型飞行器 (MAV) 和涂层材料。本研究旨在使用倒置荧光显微镜 (IFM)、扫描电子显微镜 (SEM) 和机械测试系统检查 Cyrtotrachelus buqueti 后翅的微观结构和形态。IFM用于研究后翅中弹性蛋白的分布，并进行SEM评估后翅的功能特征和横截面微观结构。此外，还检查了有关折叠线和弯曲区 (BZ) 相交位置的机械性能。Resilin 是一种类似橡胶的蛋白质，在几个活动关节和与翼膜相连的静脉壁中被发现。综合起来，结构数据、展开运动和拉伸试验的结果表明了关于 C. buqueti 后翅中弹性蛋白的两个结论：首先，弹性蛋白的分布可能与后翅的特定折叠机制有关，其次，弹性蛋白发生在以下位置：需要额外的弹性，例如在弯曲区域，以防止在后翅反复折叠和展开期间结构损坏。弹性关节的功能意义可能揭示形态学和结构后翅特性之间的进化关系。弹性蛋白出现在需要额外弹性的位置，例如在弯曲区，以防止在后翅反复折叠和展开期间结构损坏。弹性关节的功能意义可能揭示形态学和结构后翅特性之间的进化关系。弹性蛋白出现在需要额外弹性的位置，例如在弯曲区，以防止在后翅反复折叠和展开期间结构损坏。弹性关节的功能意义可能揭示形态学和结构后翅特性之间的进化关系。