四川四面山金龟子总科区系分析及其垂直分布

FAUNA ANALYSIS AND VERTICAL DISTRIBUTION OF SCARABAEOIDEA IN MT. STMIAN, SICHUAN

１９９１～１９９２年对四川省江津市四面山昆虫进行了系统调查。列出了所采的８科５６种金龟子种类名录，对它们进行了在中国动物地理区划中的归属分析，华中、西南和华南三区共有种最多，占３５．８％，与这三区有关的种类分别占９６．２％、８１．１％和６７．９％。说明这三区金电子类昆虫关系最为密切。四面山的金龟子主要是这三区的种类尤以华中区为主。东洋区种占６９．３８％，东洋区及其跨区种占９０．６％，古北区及其跨区种占３７．７％。说明四面山属东洋区系范畴，但有一些古北区系种类。根据其垂直分布，将四面山分为３个带，随着海拔增高，东洋区种类递减，分别是６０．６％、５０％和３５％；而古北区种类逐渐增多，分别为６．１％、１０．７％和２０％。

The insect fauna of Mt.Simian of sichuan province was systematically investigated in 1991～ 1992.The natural circumstances of the mountain is introduced and all the 8 families and 56 species of Scarabaeoidea(Coleoptera)are listed.The common species with the central,southwestern and southem China regions make up 35.8% of the total 56 Scarabaeoidea species,while the spocies related tO the above regions contribute to 96.2%,81.1%and 67.6%respectively,which shows that the three re- gions are closely related and the Scarabaeoidea spocies mainly belong to the three regions, especially to the central China region. The species of and species related to the oriental region make up 60.38%and 90.6%separately and those related to Palaearctic region make up 37.7%. Thus the Scarabaeoidea species in Mt.Simian fall in the fauna of oriental region and some species in fauna of the palaearctic region. Their vertical distribution is divided into three zones. The oriental species decrease and are 60.6%,50% and 35%of the total respotively in the three zones with the rising of the elevation,while the palaearctic species increase with elevation and are 6.1%,10.7%and 20%of the total re- spectively in the three zones.