A Revision of the Buprestid Subtribe Xenopsina subtr. n. with Description of New Species from the Genera Xenopsis Saund. and Sommaia Toyama (Coleoptera, Buprestidae, Polycestinae) and Notes on Its Systematic Position

摘要

A new subtribe, Xenopsina subtr. n., comprising the Oriental genera Xenopsis Saimders, 1867, Sommaia Toyama, 1985, Kurosawaxia Descarpentries, 1986 (all genera transferred from Polyctesini), and Thejyola Nelson, 1997, stat. n. (transferred from subtribe Polycestina), is established in the tribe Polycestini Lacordaire, 1857. Analysis of morphological characters has not supported the separation of the Polyctesioid lineage which was established on the ground of antennal sensory organ arrangement (Volkovitsh, 2001), and the tribes Thrincopygini, Polyctesini, and the Chtysophana group are transferred to the Polycestioid lineage. Polycesta (Theryola) Nelson, 1997 is upgraded to the generic level; the generic name Paraxenopsis Cobos, 1980 is synonymized with Xenopsis Saunders, 1867. Xenopsis woodleyi (Malaysia), X. violaceocyanea (Malaysia), X. kubani (Laos), X. pacholatkoi (Thailand, Laos), and Sommaia kalabi (Myanmar) spp. n. are described, compared, and illustrated. Keys to the genera of Xenopsina subtr. n. and to the species of Xenopsis and Sommaia are presented. Diagnostic characters of Xenopsina, Polyctesini, and Polycestini are discussed.