Taxonomic Study On Part Group Of The Tribe Tritomini From China (Coleoptera:Erotylidae)

Tritomini is classfied of the Coleoptera,Erotylidae,Erotylinae.There are more than 1,200 species of 92 genera in the world,and 97 species of 15 genera are known in China.This tribe are all mycophagous.This tribe is mainly distributed in South America,Africa and Asia.The study in our country is in the initial stage,and the previous work was mostly done by foreign academics,therefore it has great significance to study on the taxonomy of this tribe in China.Based on classical taxonomy and cladistics,this study conducted a systematic classification study on domestic and foreign collection specimens,field collection.Providing 59 feature illustrates,53 forms in total.The main results are as follows:By recorded and summarizied the geographical distribution information of species,the distribution of the 15 genera are summarized.The study found that the species of this tribe in China is the most distributed in southern China(46.3%),Southwest China(28.9%),Central China(25.7%)is next,the Qinghai-Tibet(1.0%)is last,the Central China region are overlapping with South China in species.In genus degree,South China region contains 86.7% of the known genera in China,and 13 genera are distributed in this area.Such distribution may be the result of its adaptation to high temperature and humidity environments,and our country maybe the sub-division area of this tribe.This study use the classification taxonomy to analyzed the phylogenetic relationship of 13 genera of this tribe from China: Dacne picta and Episcapha flavofasciata as the outer group,the tribe 13 genera with 17 species use as inner group,use 38 adult characters to established the characters matrix.It is initially concluded that the Tritomini is a monophyletic group.From the cladogram,the tribe is divided into three branches,of which the two species of the Spondotriplax are clustered into one branch,and this genus’ s characters are ancient than other genera.The tip with hook in lacinia is jointly distributed belong to the second branch,the Dactylotritoma with closely relationship with Pselaphandra and Rhodotritoma.The third is jointly derived from the tip of lacinia without projection,Tritoma and Neotriplax with close relationship.The antennae,with or without hook of the lacinia and the hind wings were studied.The club shape in genera degree are changed greatly,while little change in species degree.The presence or absence of hook at the tip of the lacinia of this tribe can be divided into two types.Through the analysis of the hind-winged anal veins,the anal veins changes in the wing of the genus are mainly concentrated on the presence or absence.Therefore,the antennae,lacinia and hind wings can be used to classified of the genus degree.In the species study,a description of 97 species of 15 genera in China was carried out,and the key to species of genus and subgenus are presented,which provided the citation,synonyms available data,and the origin,preservation place and geography of the specimens.During the study period,a total of 2 new records genera,27 new species,and 8 new records were found:2 new records belong to: Psedamblyopus Araki,1941;Pselaphandra Jacobson,1904.Before the study,this two genera were both distributed in the Russia,Japan and South Korea.In the study,the geographical distribution is expanded,and our country is the southernmost point of the geographical distribution of these.27 new species,Neotriplax bicolorata sp.nov.;Neotriplax guangxiensis sp.nov.;Neotriplax wenchuanensis sp.nov.;Neotriplax pangquangouensis sp.nov.;Pseudamblyopus sinica sp.nov.;Cyrtomorphus brunneusfiscata sp.nov.;Tritoma tibetensis sp.nov.;Pseudotrioma gorhami sp.nov.;Pseudotritoma bipunctuatus sp.nov.;Pseudotritoma reitteri sp.nov.;Pseudotrioma lacordairei sp.nov.;Pseudotrioma semimaculata sp.nov.;Pseudotrioma octonotata sp.nov.;Pseudotrioma chujoi sp.nov.;Pseudotrioma quinipunctuatus sp.nov.;Pseudotrioma skelleyi sp.nov.;Pseudotrioma qiujianyuei sp.nov.;Pseudotrioma rufipennis sp.nov.;Pseudotrioma flavobasalis sp.nov.;Pseudotrioma yunnanensis sp.nov.;Pseudotrioma hainanensis sp.nov.;Pselaphandra laoyeshanensis sp.nov.;Pselaphandra yushanensis sp.nov.;Dactylotritoma flavoventris sp.nov.;Triplax yunnanensis sp.nov.;Triplax yingjiangensis sp.nov.;Triplax yaowangensis sp.nov..8 new record species from China,Cyrtomorphus connexus Gorham,1896;Rhodotrioma manipurica Arrow,1925;Pseudotritoma duodecimpunctata(Heller,1918);Tritoma(Rotitma)rufipennis Lewis,1887;Tritoma lobisternum Arrow,1925;Triplax scutellaris Charpentier,1825;Triplax yakushimana Nakane,1959;Triplax ainonia Lewis,1887.