Distribution in Iran. Guilan (Ghahari et al. 2012 b).
Distribution outside Iran. Austria (Fischer 1980, 1981 as Opius mutus; Hellrigl 1997 as Opius mutus; Yu et al. 2012), Bulgaria, Czech Republic, Denmark, Finland, Hungary, Italy, Lithuania, Romania, Russia, Slovakia, Spain, Switzerland (Yu et al. 2012), England (Broad et al. 2012; Yu et al. 2012), Germany (Belokobyskij et al. 2003; Yu et al. 2012), Sweden (Thomson 1895; Yu et al. 2012), Switzerland (van Achterberg 2014 b as Opius brevipalpis), Turkey (Fischer and Beyarslan 2005 a; Beyarslan and Fischer 2011, 2013; Yu et al. 2012; Beyarslan 2015).
Host records. It is reported from Agromyza hendeli Griffiths, 1963 (Diptera: Agromyzidae) and Delia quadripila (Stein, 1916) (Diptera: Anthomyiidae) (Yu et al. 2012).