Range of Occurrence of Bisexual and Parthenogenetic Populations of Labidostomma luteum (Acari: Prostigmata) in Europe

The current article describes an interesting case of geographic parthenogenesis among European mites from the Labidostommidae family (Acari: Prostigmata). In earlier publications on Labidostomma luteum Kramer, 1879, the authors pointed out that most of the populations of this species in Europe consisted of parthenogenetic females. Until now, populations of both sexes were known only in southwestern France. In the north-west areas, the number of males in the populations has gradually decreased, and in the populations found west of Paris there are no males at all. During the research project carried out in 2018, Bloszyk found the presence of populations which consisted of both sexes of the species in question near the town of Beny (60 km NE of Lion). This is the easternmost site of L. luteum in France where males have been found. All other known sites located east and north of the Beny-Paris line have only parthenogenetic females. Thus, this line can be considered as the boundary of L. luteum populations reproducing sexually. However, establishing the exact course of this range requires further research.