(Fig. 5 A)
Belba mongolica Bayartogtokh, 2000: 309, figs. 23–31.
Measurements. Body length 466 µm, width of notogaster 280 µm, length of notogaster 303 µm.
Supplementary description. Body color yellowish brown, notogaster with part of exuvial scalps, and legs with fungi micelles. Prodorsum with welldeveloped tubercles Aa and Ap. Postbothridial tubercle Ba in examined material was relatively narrower than that in the type material (Fig. 5 A). Structure of notogaster, ventral plates and legs is same as shown in the original description. The species was found previously only from coniferous forest in taiga zone of northern Mongolia, and it is interesting that the second locality is in so far grassland habitat in eastern part of the country.
Material examined. One specimen (male): Basin River Numrugiin Gol, District Sumber, Province Dornod, soils under willow growing on the bank of river, 47 °00’ 39 ”N, 199 ° 22 ’ 59 ”E, 884m a.s.l., 26 May 2003, Col. B. Bayartogtokh.