宁夏拟步甲的区系组成和分布特征

宁夏回族自治区已知１８族、３３属８３种拟步甲，以此作为研究材料论证了该类昆虫在宁夏的区系分布和组成、区域分布和生态地理分布特点。在区系分布方面，荒漠成分有７３种（占８９％），黄土高原成分有２２种（占２７％），两种成分共有的１３种。在区系特殊上，国内蒙新区成分有７１种（占８６．６％），华北成分有３５种（占４２．７％），青藏成分有７种（占８．５％），东北成分和华南成分分别有９种（占１１％）和３种（占３

Fauna Composition and Distributiona Characters of Darklin Beetles (Coleoptera: Tenebrionidae) in Ningxia Hui Autonomous Region

18 tribes 33 genera 82 species of darklin beetles in Ningxia Hui Autonomous Region are reported and taken as important materials to discuss their fauna distribution and composition areal distribution and distributional characters of ecological geography.On fauna distribution a spect:73 species belong to the desert member (89%),22 species are the loess plateau member (27%) and both of the members coexisted 13 species in Ningxia.On fauna characters:71 species are defined as Mongolia-Xinjiang member (86.6%),35 species are North China member (42.7%),7 species are Qinghai-Xizang member (8.5%),9 species (11%) and 3 species (3.6%) are Northeast China and South China member,respectively; 3 species are Southwest China member (3.6%) and only 1 species is Middle China member (1.2%).These results indicated that the darklin beetles of Ningxia Hui Autonomous Region owned absolute predominance as member of Mongolia-Xinjiang Region in faunical composition,next is member of North China Region,other members of faunical rgion from the close to the far respectively are Northeast China Region,Qinhai-Xizang Region and Middle China Region.This preliminary result also showed that both wide and narrow of distributive limits this group:member of Pan-Palearctic Region has 7 species (8%) which all belong to stock pests; member of Middle Asia has 13 species (16%); member of Oriental Region has 2 species (2.4%); peculiar member of locality has 14 species (17%).According to known kinds of darklin betles in Ningxia,author maintain that areal entomological geography should be evided into three small regions at present as following:The loess plateau Region:total 23 species (27%) (including common species); The Desert and Semidesert Region:total 73 species (89%) (including common species); The Liupan Montain Region:total 13 species (15.8%) (including common species).In addition to the vertical distribution,level distribution and general ecological geography characters are introduced in this paper.