Spider fauna of peat bogs in southwestern Finland

The most common and abundant spider species on open peat bogs in mainland of SW Finland were Arctosa alpigena, Pardosa hyperborea, P. sphagnicola, Alopecosa pulverulenta, Trochosa spinipalpis, Antistea elegans, Agyneta cauta and Pirata uliginosus. Northern bog spiders can be divided into three groups: 1) species found only on the inland bogs (e.g. Pardosa atrata and Mecynargus sphagnicola), 2) also on the coastal bogs (e.g. Pardosa hyperborea and Gnaphosa lapponum) and 3) even on the archipelago bogs (Arctosa alpigena and Gnaphosa microps). Southern species on bogs include spiders 1) occurring only in the archipelago and coastal area (e.g. Ozyptila gertschi and Satilatlas britteni) and 2) species found also on mainland peat bogs in SW Finland (e.g. Glyphesis cottonae and Zora parallela).