Androlaelaps fahrenholzi is a mite with a large distribution and associated with a wide range of hosts. To assess morphometric variation of A. fahrenholzi associated with different host species (Phyllotis xanthopygus and Akodon albiventer, both from Putre, Chile) and localities (Las Chinchillas National Reserve, Fray Jorge National Park, and Llanos de Challe National Park, all in Chile and all from the host Phyllotis darwini), 41 morphological characters of each specimen were measured, and principal component analysis and discriminant analysis were used. Both analyses showed two groups separated for species of rodents. Mites associated with P. xanthopygus are smaller than those of A. albiventer. The analysis by location indicates two groups: group 1 comprises all mites collected from Fray Jorge National Park and Las Chinchillas National Reserve, and group 2 comprises only mites from Llanos de Challe National Park. These results indicate that A. fahrenholzi population can vary between hosts and geographical areas. Molecular analysis would be necessary to validate these results and determine whether they are subspecies or different species.

中文翻译：

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智利北部与三个Sigmodontinae（Rodentia：Cricetidae）有关的Androlaelaps fahrenholzi（Mesostigmata：Laelapidae）的形态变化。

细叶螨（Androlaelaps fahrenholzi）是一种分布广泛的螨虫，与多种宿主相关。为了评估与不同寄主物种（均来自智利普特尔的Phyllotis xanthopygus和Akodon albiventer，都来自智利）和地区（Las Chinchillas国家保护区，Fray Jorge国家公园和Llanos de Challe国家公园）相关的华氏A.形态变化所有样品均来自寄主Phyllotis darwini），测量了每个标本的41个形态特征，并使用了主成分分析和判别分析。两项分析均显示，啮齿类动物分为两组。与黄腐病相关的螨虫小于答：albiventer。按位置进行的分析表明有两组：第一组包括从弗雷·豪尔赫国家公园和拉斯钦奇利亚斯国家保护区收集的所有螨虫，第二组仅包括来自拉诺斯·德·查勒国家公园的螨虫。这些结果表明，华氏A.华氏菌种群可以在寄主和地理区域之间变化。需要分子分析来验证这些结果并确定它们是亚种还是不同物种。