Identifying The Relationship Of Geographical Populations Of Protaetia Brevitarsis(Coleoptera: Scarabaeidae)

This article textual researching the Latin name and the C hinese name of Protaetia brevitarsis and point out the correct Latin name of it, put forward suggestions about its Chinese name. And speculate the intrude source of Xinjiang Protaetia brevitarsis by the method of molecular systematic and geometrical morphology, the main consequences as follow:The diagnosis morphological characters of Protaetia brevitarsis are provided. The Latin name and Chinese names are verified, The results show that the the correct Latin names is Protaetia brevitarsis, the academic C hinese name should be short instep scarab beetle according to the meaning of“brevitarsis”,however, to keep use the current Chinese name is recommended since the name is popularly accepted.The author extensively gathering the samples in Xinjiang and other districts of C hina as well as other countries, and using the technology of molecular systematic and taking mitochondrial gene COI and nuclear gene EF-1? as the genetic marker to speculate the genetic relationship between different populations of Protaetia brevitarsis in different part of Xinjiang. The result shows that the Protaetia brevitarsis in different parts of Xinjiang can be assembled to the same branch, they have a higher homology. The Inner Mongolia area and Ningxia area are close to Xinjiang. So the Protaetia brevitarsis specimens of those three places have a higher homology.The morphology of the pronotum and elytra of Protaetia brevitarsis was studied based on 700 individuals from 30 regions of C hina and adjacent areas using geometric morphometrics approaches. The geographical variations on morphology were analyzed based on Principal Component Analysis(PCA) and Canonical Variates Analysis(CVA). This study proved that the white spot on the pronotum and elytra could be a sound evaluation criteria for geographical variations of Protaetia brevitarsis. The geographical distances were related to the morphological distances in a certain degree. We assumed that Protaetia brevitarsis possibly invaded Xinjiang from N ingxia, Inner Mongolia and Gansu outside the north border of Q inghai, and that the source of Protaetia brevitarsis invading Xinjiang is the same with that invading these three provinces. This study demonstrated a research model which could have a broad prospect to enrich the microevolution theory and molecular ecology research.