Arzanov 2005. Towards the knowledge of the systematic of a weevil tribe Cleonini (sensu lato). 1. genera Pseudocleonus Chevrolat, 1873, Cleonis Dejean, 1821, Adosomus Faust, 1904, Cyphocleonus Motschulsky, 1960 and Xeradosomus gen. n. (Coleoptera: Curculionidae, Lixinae). Kavkazskii Entomologicheskii Byulleten, 1(2) 2005: 129-149