A Taxonomic Study On Caelifera From Northeastern China

Caelifera belonged to Orthoptera, and Acridoidea and Tetrigoidea of Orthoptera distributed in Northeast of China. Insects of Acridoidea and Tetrigoidea are usually called grasshoppers.Grasshoppers are an important invertebrate and primary consumer. Hundreds of grasshoppers can lead to different extent of injury to agriculture, forestry and animal husbandry. Historically, disasters of grasshopper, flood and drought often broke out at the same time or one after another. Grasshopper disaster turned out to be an vital disaster to human society. The author investigated species and distribution of grasshoppers through collecting specimens in the open country, gathering previous specimens and arranging related materials.Main contents and results of this essay:1. This paper su mmarized the research history and domestic research outline of taxonomic study on Caelifera, and gave some details on morphological character and biology of Caelifera.2. Taxonomic study on Caelifera.Based on collecting specimens outdoors and indoor identification of species, the results indicated that insects of Caelifera in this area was composed of 2 superfamilies, 8 families, 57 genera, 173 species, 16 new species, 1 new subspecies, 2 female descriptions and 1 male description. Their latin names as follows: Epacromius fallax sp. nov., Xenocatantops liaoningensis sp. nov., Podismopsis aquamopennis sp. nov, Chorthippus changbaishanensis longipennis ssp. nov., Formosatettix changbaishanensis Yuan et al., 2006, Formosatettix lushuiheensis sp. nov., Clinotettix changbaishanensis Wang et al., 2004, Tetrix dongningensis sp. nov., Tetrix jilinensis Ren et al., 2004, Tetrix tenuicornoides Wang, Yuan et Ren, 2006, Tetrix changchunensis Wang, Wang et Ren, 2005, Tetrix sipingensis Hao et al., 2006, Chorthippus heiheensis sp. nov., Chorthippus xiaoxinganlingensis sp. nov., Chorthippus kalunshanensis sp. nov., Euchorthippus heiheensis sp. nov., Gelastorhinus liaoningensis sp. nov., Chorthippus ateridorsus Jia et Liang, 1995, female, Confusacris viridis Ren et Zhang, female, Clinotettix jilinensis Zheng et Ren, male.3. Faunal analysis of Caelifera in northeastern China.Northeastern. China is part of Palaeartic realm, northeastern sub-realm, northeastern area in animal regional divide. Northeastern area can be divided into Daxing'anling subregion, Changbai mountain subregion and Songliao plain subregion. 173 species of Caelifera was consisted of 141 species in Palaeartic species occupied 81.50ï¼…, 31 species in wide range species occupied 17.92ï¼…, 78 species in peculiar species occupied 45.9ï¼…. Diversity of species in Changbai mountain subregion was more abundant than the two others. It could reflected that there were different types of ecological environment in Changbai mountain subregion. 4. Studies on antennal sensilla of TetrigidaeResults showed that patterns of Tetrigidae antennal sensilla was simple and the number of antennal sensilla was small. The differentiation of types and distribution was not obvious among genera, but it was clear among species.The author investigated types and distribution of Caelifera insects in Northeast of China, and did some research on antennal sensilla of Tetri at the same time. This result probably did not including all types of grasshoppers in this area, so it is necessary to do further reararch.