Clarification of the taxonomic status and distribution of a number of Asian species of the tribe Rhamphini (Coleoptera: Curculionidae, Curculioninae)

Abstract The taxonomic status of a number of Eastern and Central Asian species of the tribe Rhamphini are clarified. Five new synonymies are proposed: Amurorchestes Legalov, 2007 syn. n. and Granulorchestes Legalov, 2007 syn. n. of Orchestes ( Salius ), Rhynchaenus guliensis L. Yang & Dai, 1991 syn. n. of O. amplithorax Faust, 1882, R . maculosus L. Yang & X. Zhang, 1991 syn. n. of O. fasciculatus Faust, 1882, and R. empopulifolis Y-Q. Chen & L. Zhang, 1988 syn. n. of R. seriatosetosus Ter-Minasian, 1953. Two new combinations are introduced: Pseudorchestes (s. str.) tianschanicus (Bajtenov & Kazakova, 1971) comb. n. and Tachyerges seriatosetosus (Ter-Minasian, 1953) comb. n. Orchestes ( Salius ) variegatus Roelofs, 1875 stat. rest. was restored from synonymy with O. mutabilis Boheman, 1843. Due to its important economic significance as a pest of poplars, T. seriatosetosus is completely redescribed and illustrated in detail. Also, Tachyerges nakamurai (Morimoto & Miyakawa, 1996) is recorded for the first time for Russia and for the continental part of Asia, O. harunire (Morimoto, 1984) for Russia, T. seriatosetosus – for Turkmenistan.