A histiostomatid species, colonized from the fungus, Fusarium oxysporum (Nectriaceae) cultured in Plant Pathology Department, Shandaweel Agricultural Research Station, Sohag governorate, Egypt, was studied taxonomically. The morphological characters of the deutonymph were identical to those of Hormosianoetus mahunkai Eraky and Shoker,1993 isolated from banana suckers cultivated in the farm of the Faculty of Agriculture, Assiut University, Egypt. The adult male and female are described and illustrated for the first time and the deutonymph is re-described. An identification key for histiostomatid genera was also provided in the present study.