Systematics Of Aseiminae And Disteniidae From China

Aseminae and Disteniidae are small groups in longhorn beetles, but many species are serious forest pests. To fill the vacancy of researching actuality in Aseminae and Disteniidae of China, the present dissertation deals with the systematics of this two groups from China. The research history of Aseminae and Disteniidae of the world is briefly intruduced. The adult morphology of two groups are provided. Based on the adult morphology data, the phylogenetic study on these two groups is made. The zoogeography of Aseminae and Disteniidae are analyzed. The result of the disseration are listed as follow:1Systematics of Aseiminae from China1.1Taxonomy33species in8genera of Aseminae are listed systematically and discribed. The keys to tribes, genera and species are provided. Type specimen of15species in6genera3tribes are examined. The adult habitus of23species in8genera are given, including15type species. A study of genitalia of some species is performed, the morphological characters are described and the details of the structures are drawn. The scientific name of Arhopalusferus (Mulsant,1839) distributed in China is revised.1.2Phylogenetic analyses of AseminaeBased on the morphological data, the phylogenetic relationships of Aseminae are re-constructed. The results are as follows:①The Chinese Aseminae is a polyphyletic group, the Spondylidini should be excluded from Aseminae and constituted a new subfamily Spondylidinae;②The Chinese Asemini is not a monophyletic group;③The Chinese Arhopalus is a paraphyletic group, Megasemum should be combined with Arhopalus as a subgenus; Except Arhopalus, the monophyly of the other genera of Aseminae are well supported;④The Chinese Atimiini is a monophyletic group, including2genera:Atimia and Proatimia. And in genus Atimia, Atimia chinensis and Atimia esakii are sister group.1.3Zoogeography of Aseminae〢ccording to the general data of the geographical distribution, the fauna of Asemina in China is analyzed. The result shows that the Southwest region which belongs to Oriental realm has the richest species diversity of Aseminae, the follows are Northeast region and Inner-mongolia-Xinjiang region, and the Middle China region has the least species. But Palaearctic realm has26species, accounting for78.79%of the total, and has14endemic species; the Oriental realm only has19species, just accounting for57.58%of the total. In general, the Aseminae from Palaearctic realm compose the principal part of the Chinese fauna. Base on the result of fauna analyzed,7endemic distributions are divided:Tibet Region, Southwest of Yunnan, Middle of Yunna, Western Sichuan Plateau, Xinjiang Region, Taiwan Island and Southeast of China.②Using the BPA analysis, the zoogeography of Atimia and Asemum are discussed. It shows that Atimia chinensis Linsley,1939spread from Inner-mongolia-Xinjiang region to North China region and South China region; Atimia tuncatella Holzschuh,2007is spreaded from Southwest China region to North China region; All the species of Asemum are widely distributed in China, and the diffusion path are not very clear.2Systematics of Disteniidae from China2.1Taxonomic of morphology27species in7genera of Disteniidae are listed systematically and described. The keys to tribes, genera and species are provided. Type species of17species in6genera are examined. The adult habitus of14species in4genera are given, including17type species.2.2Phylogenetic analyses of DisteniidaeBased on the morphological data, the phylogenetic relationships of Disteniidae are re-constructed. The results are as follows:①The Chinese Disteniidae is not a monophyly group,the status of Dynamostini is uncertain;②The Chinese Cyrtonopini is a monophyly group, Cyrtonops punctipennis and(Cyrtonops asahinai+Cyrtonop nigra) are sister group;③The Chinese Disteniini is a monophyly group, Distenia and Typodiyas are sister genera;④In geneus Noemia, Noemia semirufa Villiers,1958and Noemia submetallica Gressitt,1940have a close relationship.2.3Zoogeography of Disteniidae①According to the general data of the geographical distribution, the fauna of Disteniidae in China is analyzed. The result shows that the Oriental realm has24species, accounting for88.89%of the total, and has18endemic species; the Palaearctic realm only has7species. In general, the Disteniidae from Oriental realm compose the principal part of the Chinese funa. Yunnan Plateau is found to be the area with the richest endemic components, the second one is Taiwan Island; The two region are belong to Oriental realm.②Using the BPA analysis, the zoogeography of Cyrtonops is discussed. It shows that Cyrtonops asahinai Mitono,1947spread from North China region to South China region and Southwest China region, but the diffusion path of Cyrtonops punctipennis White,1853and Cyrtonops nigra Gahan,1906are not very clear.