河北小五台山昆虫区系分析

Analysis of insect fauna from Xiaowutai mountain,Hebei province

基于河北省小五台山已知16目2 404种昆虫,对其种类组成进行了初步分析.鉴定结果表明:小五台山昆虫由6目137科2 115种完全变态类和10目66科289种不完全变态类组成;种级阶元组成以鳞翅目和鞘翅目为主,共占总种数的59.15%,而其他14目共占40.85%;科级组成以鞘翅目最多,鳞翅目和半翅目次之,其次为双翅目,分别占科级总数的23.65%,19.21%,19.21%和13.30%,共占75.37%.研究数据显示,小五台山昆虫的区系组成以古北界+东洋界共有成分为主,占总数的45.47%;古北界成分占总数的43.16%,东洋界成分占0.13%,古北界、东洋界以及两界共有成分占到已知总数的88.75%,而其他动物地理区的成分仅占11.25%,说明其与古北界、东洋界的联系紧密,而与其他动物界的关系疏远.物种复计数据表明,该区昆虫分布与东北区关系紧密(60.74%),与蒙新区、西南区和华中区有较大联系,而与华南区和西藏区的关系疏远;已知土著昆虫17种,占总种数的0.71%.

2 404 insect species in 16 orders are recoganized in Xiaowutai mountain, Hebei province. A- mong them, 2 115 species are holometabolous, belonging to 137 families of 6 orders, and 289 species are hemimetabolous, belonging to 66 families of 10 orders. Most species are members of Coleoptera and Lepi- doptera, which account for 59.15% of the total number of the known species, while species of others 14 orders account for 40.85 %. In the familial level, Coleoptera has the largest number of the known families, Lepidoptera and Hemiptera are the second largest orders, and Diptera follows, accounting for 23.65~, 19.21%, 19.21% and 13.30~ of the total number of the known families respectively, and 75.37% of the total species. The faunistic components are analyzed, with about 88.75 % of the total known species being common species and widely distributed in the Palaearctic and Oriental regions; 43.16% are restricted to the Palaearctic Region, 0.13% to the Oriental Region, 45.47% in both Palaearctic and Oriental regions, and the left account for 11.25% and 17 species （about 0.71%） are endemic. The result shows that Xiaowutai mountain lies in the Palaearctic Region and some Oriental species are diffused to this area due to lacking of the natural obstacles in the southeast China. Besides, the fauna of Xiaowutai mountain is most closely related to that of Northeast Region （common species account for about 60.74%）, more closely re- lated to those of Mengxin area, southwestern area and central China, but far from those of south China and Qinghai-Tibet area.