内蒙古拟步甲多样性与区系组成分析

Analysis of Diversities and Faunal Composition of Darkling Beetles(Tenebrionidae,Coleoptera)in Inner Mongolia

经对河北大学博物馆保存的内蒙古拟步甲定名物种和相关资料的整理,共得到6亚科26族65属232种(亚种).依据这些种类及其相关信息,分析了该科昆虫的区系组成和地理分布特征,得到如下初步结果:(1)内蒙古拟步甲区系以古北界蒙新区成分占绝对优势,总种数高达232种(100.0%),它与华北区和东北区的分布关系紧密联系,前者达到57种(24.6%),后者达到30种(12.9%),而与华中区、青藏区、华南区、西南区的联系比较疏远,共同分布种类分别为28种(12.1%)、28种(12.1%)、22种(9.5%)和11种(4.5%);(2)内蒙古拟步甲在物种数量分布上呈明显的西多东少趋势,物种分布自西向东依次为:阿拉善荒漠草原区144种(62.1%)>蒙中干草原区98种(42.3%)>呼伦贝尔-辽西区52种(22.4%)>蒙东干草原区48种(20.7%)>大兴安岭森林草原区14种(6.0%);(3)内蒙古拟步甲的特有属、种相对丰富,已知有19属(29.2%)和29种(12.5%).本文还对内蒙古拟步甲的现有区域分布格局进行了分析和讨论.

According to arrange the designation and relative materials of darkling beetles, preserved in Hebei University Museum found in Inner Mongolia,there are 232 species （subspecies）,belonging to 65 genera,26 tribes and 6 subfamilie were identified. Basing on the above data,we analyzed the characteristics of the faunal composition and geographical distribution of the so family insect,and received the following preliminary results.（1） The dominated element of the fauna of the Inner Mongolia darkling beetles are from the Palaearctic realm of Mengxin area, which attains 232 species （100.0%） and closes to the North China-57 common species （24.6 %） and Northeast China- 30 common species （12.9%）,but more different with Central China-28 common species （12.1%）, Qin-hai Tiketan Region-28 （ 12. 1%）, Southern China-22 common species （9.50%）, and Southwest China-11 common species （4.5 %）;The map of the distribution of Inner Mongolia darkling beetles show a trend of that the species gradually increased from the West to the East,which proper order is：Alxa Desert-144 species （62.1%） 〉 Centro-Inner Mongolia Semidesert-98 species （42.3%） HulunBuir-West Liaoning 52 species （22.4%） 〉 the Arid-Steppe Region of Eastern Inner Mongolia-48 species （20.7%） 〉 the Arid-Steppe of Eastern Inner Mongolia-14 species （6.0%）;（3） The Inner Mongolia darkling beetles are more abundant in characteristic genera and species, we already found 19 genera （29.2 %） and 29 species （12.5%）. In addition,this work also analyzed and discussed the regional distributions of the Inner Mongolia darkling beetles currently.