Redescription of Hypochthoniella minutissima (Berlese) (Acari: Oribarida) with a checklist and a key to the Arthronotic 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 for the adult, based on the material collected from Guilan Province Iran. A checklist and an identification key to the twenty species of arthronotic oribatid mites of Guilan Province are provided. The genus and subgenus Eohypochthonius (Eohypochthonius) Jacot, and Eohypochthonius (Eohypochthonius) magnus Aoki, E. (E.) crassisetiger Aoki, Cosmochthonius (Cosmochthonius) plumatus Berlese, Brachychthonius impressus Moritz and B. hungaricus (Balogh) are new records for Iran mite fauna.