内蒙古拟步甲与地理分布

The Known Tenebrionid-Beetles of Inner Mongolia Autonomous Region and its Entomo-Geographical Distribution

内蒙古自治区已知拟步甲由 3亚科、2 0族、4 4属、158种组成。以此为材料讨论了该类昆虫的区系组成和生态地理分布特点。研究结果表明 ,内蒙古拟步甲区系以古北区中亚细亚成分占绝对优势 ,特别是蒙古种、新疆种和华北种占主体 ,特有种占 2 6 .6 % ,具有较明显的区域特点。现知种类主要分布在内蒙古西部至中部的荒漠半荒漠地区。依据已知拟步甲种类将内蒙古划分成 5个四级昆虫地理区 ,即 :阿拉善荒漠昆虫区、蒙中半荒漠昆虫区、蒙东干草原昆虫区、呼伦贝尔 -辽西昆虫区和大兴安岭森林草原昆虫区。根据不同区域拟步甲种类及其分布情况 ,采用Sψrensen系数比较了它们之间的相似性 ,并对各区的分布特点进行了分析。

The known Inner Mongolia tenebrionid beetles (Coleoptera:Tenebrionidae) are composed of 3 subfamilies, 18 tribes,44 genera and 158 species up to now. According to these updated data, their characters on the fauna and zonal distribution are researched. Judging from the faunal composition, the palaearctic species are absolutely dominant, with the species from Inner Mongol- Xinjiang and northern China as the principle component. The endemic species distributed in the desert and semidesert regions of the west...