Additional description of Hypochthoniella minutissima (Acari: Oribarida) with a checklist and a key to the enarthronotic oribatid mites of Guilan Province, Iran

Hypochthoniella minutissima (berlese, 1904) is newly reported from guilan province, iran. after comparison with the original description and redescriptions, we here provide an expanded description, including illustrations of the adult, based on material collected from guilan province, iran. a checklist and an identification key to the 20 species of enarthronotic oribatid mites of guilan province are provided. the genus and subgenus eohypochthonius (eohypochthonius) jacot, and the species eohypochthonius (eohypochthonius) magnus aoki, e. (e.) crassisetiger aoki, cosmochthonius (cosmochthonius) plumatus berlese, brachychthonius impressus moritz and b. hungaricus (balogh) are new records for the iran mite fauna.