Distribution in Iran. Ardabil (Linnavuori 2007; Ghahari et al. 2011), Bushehr (Linnavuori 2010), East Azarbaijan (Khaghaninia et al. 2010 c), Fars (Linnavuori 2010; Zarei et al. 2012), Golestan (Khormali 2000; Ghahari & Ostovan 2006; Ghahari et al. 2011; Ghahari 2013), Guilan (Linnavuori 2007), Hamadan (Abd-Rabou & Ghahari 2006 under the combination Calocoris diversicornis Reuter), Hormozgan (Wagner 1968 a; Linnavuori 2004 b), Ilam (Linnavuori 2010), Isfahan (Rakhshani et al. 2010), Kerman (Reuter 1904; Wagner 1958; Mehrnejad & Linnavuori 2012; Memand et al. 2012), Kermanshah (Linnavuori 2010), Khorasan (Wagner 1957; Abd-Rabou & Ghahari 2006; Linnavuori & Modarres Awal 1999; Havaskary et al. 2010), Khuzestan (Farahbakhsh 1961; Linnavuori 2010), Kordestan (Linnavuori 2010; Ebrahimi et al. 2012), Kuhgiloyeh & Boyerahmad (Linnavuori 2010), Markazi (Arkani et al. 2011), Mazandaran (Ghahari & Ostovan 2006; Ghahari et al. 2011), Sistan & Baluchestan (Wagner 1957), Tehran (Linnavuori 2007), West Azarbaijan (Linnavuori 2010), Zanjan (Linnavuori 2007), Iran (no locality cited) (Kerzhner & Josifov 1999), generally distributed (Modarres Awal 1997 c).
General distribution, host and prey. Irano-Turanian species, extending from the Balkan Peninsula to the Middle East, Central Asia, China and Pakistan. C. diversicorne living on numerous plants and is a predator of aphids, Noctuidae, mites (Modarres Awal 1997 c) and Aleyrodidae (Ghahari & Ostovan 2006).
Comments. The braconid wasp, Leiophron (Euphorus) deficiens Ruthe, 1856 (Hymenoptera, Braconidae, Euphorinae) was collected from Qaemshahr (Mazandaran province) as the parasitoid of C. diversicorne (Efil et al. 2009).