ABSTRACT Pseudoscorpiones is a mesodiverse order of Arachnida, with more than 3600 described species in the world. Species delimitation is sometimes difficult due to the high variability of some characters, difficulty in finding informative and useful characters for species differentiation and the subjectivity of individual specialists. The aim of this work is to explore and to evaluate the role of morphometric characters in species delimitation within the genus Apolpium (Olpiidae). Measurements of 17 structures of 57 individuals were taken and their length/width ratios calculated. Cluster analyses, principal components analyses, discriminant function analyses and non-metric multidimensional scaling were carried out. The results showed low resolution for the number of species currently recognised in the genus. These results highlight the importance of looking for other morphological characters, and also for a more rigorous assessment of previously used characters for defining species.

中文翻译：

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1930 年对形态特征进行评估，以划定 Apolpium Chamberlin 的种类（Pseudoscorpiones，Olpiidae）

摘要 Pseudoscorpiones 是蛛形纲的中多样性目，在世界上有 3600 多种已描述的物种。由于某些特征的高度可变性、难以为物种分化找到信息丰富且有用的特征以及个别专家的主观性，物种划定有时很困难。这项工作的目的是探索和评估形态特征在 Apolpium (Olpiidae) 属内物种划分中的作用。对 57 个个体的 17 个结构进行了测量并计算了它们的长宽比。进行了聚类分析、主成分分析、判别函数分析和非度量多维标度。结果显示该属中目前识别的物种数量的分辨率较低。