A new stenasellid isopod is described from Tashan Cave, Khuzestan Province, south-west Iran, Suspension Shock Absorber Bracket belonging to the genus Stenasellus Dollfus, 1897.The first recorded species of Stenasellidae from Iran, Stenasellus tashanicus sp.n.
, is diagnosed by the presence of antennae with a minute squama bearing paired, long, robust setae; a maxilliped endite with six coupling hooks; and slender appendix masculina with an acute apex.A revised generic diagnosis is provided with a key to the Posters six known western Asian Stenasellus species.