Palliduphantes ericaeus (Blackwall, 1853) [plachetnatka vřesová]

Spiders of the Brdy Protected Landscape Area were studied. Material obtained from pitfall traps exposed during the years 2016–2017 at 15 different representative localities included a total of 4027 individuals belonging to 154 species of spiders. Cold tolerant species (e.g. Bathyphantes similis and Pocadicnemis carpatica) as well as thermophilic species (e.g. Lathys humilis and Zodarion germanicum) were recorded. The West European species Palliduphantes ericaeus reaches here the easternmost border of its  distribution, on the contrary the East European species Walckenaeria simplex has in this territory the western limit of its areal. A quarter of the recorded spider species is closely related to the original and natural habitats. Together with the published data and data from arachnological databases, the occurrence of 220 species of spiders is currently listed for the Brdy PLA, representing about 25 % of the total fauna of the Czech Republic. The results documented presence of interesting arachnofauna and confirm a high natural value of the given area.

Total of 92 spider species were found in the peat bog Na loučkách (Krušné hory Mts., distr. Chomutov). Findings of 19 species are considered as significant: Robertus scoticus, Anguliphantes tripartitus, Aphileta misera, Centromerus pabulator, Drepanotylus uncatus, Gonatium rubens, Helophora insignis, Hilaira excisa, Kaestneria pullata, Maro lepidus, Oryphantes angulatus, Palliduphantes ericaeus, Poeciloneta variegata, Semljicola faustus, Walckenaeria alticeps, Pardosa sphagnicola, Pirata uliginosus, Iberina difficilis, Talavera parvistyla. Species Maro lepidus, Talavera parvistyla, Palliduphantes ericaeus, Semljicola faustus are highly endangered. Palliduphantes ericaeus is reported from the Czech Republic for the first time.