Taxonomic Study And Molecular Phylogeny On Some Species Of Dianous From Yunnan

Staphylinidae is one of the largest family in Coleoptera, they occupy a wide variety of habitats andhave a wide range of food-habits. They are essentially carnivorous (insect feeder), but some groups havebecome evolved as mycophagous, coprophagous, carpophagous, pollinophagous and so on. Some specieshave adapted to a parasitism of mammals. Their prosperity is inevitably causing direct interaction betweenthem and mankind.Dianous is one of the important genera of the subfamily Steninae in the family Staphylinidae. It wasestablished by Leach in 1819. Gyllenhal (1810) designated Stenus coerulescens Gyllenhal as the typespecies for the genus. Up to the present, 216 species of the genus have been known from the world. and96 species from China.There were comprehensive studies of classification, ecology, biocontrol and other aspects of Dianoushome and abroad. In contrast, very little is known about the evolution and phylogeny of this genus. Thus, itis necessary to use molecular characters to infer the relationships of the species of Dianous. In this paper,partial species of the subfamily Steninae of Yunnan are studied from morphology and molecularsystematics.1. This paper was the first revisional study of the genus Dianous of Yunnan, China.2. In the present paper, 31 Yunnan species of the genus were recognized, of which 1 species weredescribed as new to science3. All the species were described in detail, and their sexual characters were illustrated. The colorphotos for most species were also provided. The history review, collecting techniques, and majordiagnostic characters of the genus were discussed.4. The keys to the species of the genus were presented and a catalog of the genus Dianous of Chinawas given.5. We amplified and sequenced mitochondrial cytochrome oxidase (COI) gene partical sequencefrom 15 species of Dianous (13 species), Stenus (2 species).6. Based on the analyses of COI gene sequences, we reconstructed the phylogenetic relationships ofthese species from genus aspects by using Neighbor-Joining (NJ), Maximum Parsimony (MP),Maximum Likelihood (ML) and Bayesian Inference (BI) methods.