New insights into the distribution, ecology, and systematic position of the rare water mite Rutripalpus limicola Sokolow, 1934 (Acari: Rutripalpidae)

The water mite Rutripalpus limicola Sokolow, 1934, can be considered exceptionally rare. It shows a scattered distribution range and, until recently, was known from six sites across Europe only. This strictly spring-dwelling species has highly localised distribution, presumably due to its specific ecological requirements. We present the first records of R. in Netherlands and review current state knowledge on biology. In addition previously existing morphology-based investigations, we provide phylogenetic placement based 28S rRNA gene data shed light controversial systematic position limicola: contrast hypothesised Lebertioidea-relatedness isolated, monotypic family Rutripalpidae, our results reveal putative Hydryphantoidea association. Moreover, discuss host-parasite association larvae dipteran Ptychopteridae. Combined with additional information derived new Netherlands, contribute better understanding this elusive species' biology position.