| abstract | A new species of oribatid mite belonging to the genus Pleodamaeus Paschoal is described from litter of birch forest in Central Mongolia. Pleodamaeus rotundigranulatus sp.nov. can be distinguished from single known species of this genus by the different number of genital setae, the evenly rounded posterior margin of notogaster, the different placement of notogastral and adanal setae, and the distally attenuate prodorsal, notogastral and adanal setae. In addition, the supplementary description of a known species, Nortonella mongolica Bayartogtokh and Aoki is given. |