Title Ontogeny of Tyrophagus perniciosus Zakhvatkin (Acari: Acaridae) from Western Iran Type JournalPaper Keywords Acarid mite; description; forest; mobile stages; re-description. Abstract This paper provides a re-description and description of all ontogenetic stages of the acarid mite, Tyrophagus perniciosus Zakhvatkin, 1941, collected from the soil and under forest trees litter in Hamedan province, Western Iran. Researchers Karim Haddad Irani Nejad (Fourth Researcher), Alireza Saboori (Third Researcher), Mohammad Khanjani (Second Researcher), Farshad Masoudian (First Researcher)