The genus Brevipalpus (Tenuipalpidae) includes 291 described species commonly found in the tropical and subtropical regions. Morphological characters considered in the taxonomy of Brevipalpus species are difficult to discern, which often leads to erroneous identifications and the presence of cryptic species within species is suspected. New morphological characters are now considered relevant for identification of Brevipalpus species; among them, the morphology of the seminal receptacle (spermatheca) of the female insemination system. This feature has not been considered relevant until now; thus, there is little information about the insemination system in the available species descriptions. Hence, in the present study, ultrastructural details are provided for the insemination system in five species of Brevipalpus, representing different morphological groups. The seminal receptacle (spermatheca) and the insemination duct are illustrated using light, transmission and scanning electron microscopy. The spermatheca proved to have specific morphological features that can be useful for taxonomic purposes. On the other hand, its appearance within a population might be variable in a way that needs to be ascertained and evaluated.

中文翻译：

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关于短须属（螨类：Tenuipalpidae）五种物种授精系统的一些形态和超微结构特征。


短须属 (Tenuipalpidae) 包括 291 种常见于热带和亚热带地区的物种。短须属物种分类中考虑的形态特征很难辨别，这常常导致错误的识别，并且怀疑物种内存在隐秘物种。现在认为新的形态特征与短须属物种的鉴定相关；其中，女性授精系统的精囊（受精囊）的形态。直到现在，这个功能还没有被认为是相关的；因此，现有的物种描述中关于授精系统的信息很少。因此，在本研究中，提供了代表不同形态群的五种短须属的授精系统的超微结构细节。使用光、透射和扫描电子显微镜显示了精囊（受精囊）和授精管。受精囊被证明具有可用于分类学目的的特定形态特征。另一方面，它在群体中的出现可能会发生变化，需要确定和评估。