The salivary glands of Panorpidae usually exhibit distinct sexual dimorphism and are closely related to the nuptial feeding behavior. In this study, the salivary glands of Neopanorpa longiprocessa were investigated using light microscopy and transmission electron microscopy. The salivary glands are tubular labial glands and consist of a scoop-shaped salivary pump, a common salivary duct, and a pair of salivary tubes. The male and female salivary glands are remarkably different in the bifurcation position of the common salivary duct and the length and shape of the secretory tubes. Compared with the simple female salivary glands, the male’s are more developed as their paired elongated salivary tubes can be divided into two parts, the glabrate anterior tube and the posterior tube with many secretory tubules. The ultrastructural study shows that the male salivary tubes have strong secretory function. The existence of different secretion granules indicates that there are some chemical reactions or mixing occurring in the lumen. Based on the ultrastructural characteristics, the functions of the different regions of the salivary tube have been speculated. The relationship between the salivary glands and nuptial feeding behavior of N. longiprocessa has been briefly discussed based on the structure of the salivary glands.

中文翻译：

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Neopanorpa longiprocessa (Mecoptera: Panorpidae) 唾液腺的组织学和超微结构

Panorpidae的唾液腺通常表现出明显的两性异形，并且与婚食行为密切相关。在这项研究中，使用光学显微镜和透射电子显微镜研究了 Neopanorpa longiprocessa 的唾液腺。唾液腺是管状唇腺，由勺状唾液泵、共同唾液管和一对唾液管组成。男性和女性唾液腺在共同唾液管的分叉位置和分泌管的长度和形状上有显着差异。与单纯的雌性唾液腺相比，雄性的唾液腺更发达，成对的细长唾液管可分为两部分，光滑的前管和带有许多分泌小管的后管。超微结构研究表明，男性唾液管具有很强的分泌功能。不同分泌颗粒的存在表明管腔内发生了一些化学反应或混合。根据超微结构特征推测唾液管不同区域的功能。已根据唾液腺的结构简要讨论了长柄猪笼草的唾液腺与婚后摄食行为之间的关系。