广西十万大山昆虫区系考察初报

Insect Faunal Analysis of Mt.Shiwandashan in Guangxi

关键词:  十万大山  昆虫  区系

Key words:  insect  faunal  Shiwandashan mountain

摘要:

对广西南部十万大山中部山区昆虫考察,已定名昆虫有12目104科291属388种,以鳞翅目、鞘翅目、半翅目和直翅目的种类居多,分别占19.33%、18.30%、17.01%和17.01%。种类较多的科有斑腿蝗科28种,蝽科25种,缘蝽科19种,猎蝽科、晴科、铁甲科和凤蝶科各12种,斑翅蝗科10种。各林带采集到的昆虫种类占总采集量的百分率分别为:山顶矮林带(海拔850m以上)约占8.4%;常绿阔叶林带(海拔700~850m)14目,占12%;次生热带季节性雨林带(海拔700m以下的沟谷)17目,占48.8%;马尾松林带(海拔230~400m)14目,占13.7%;经济林带(海拔150~300m)10目,占14.6%;水域带昆虫种类相当丰富.仅晴蜒目稚虫就有近30种。区系成分以东洋区种为主,占79.69%,其中马菲亚区成分占39.9%,中缅亚区成分60.1%;东洋古北兼有种占18.01%;广布种(垮3个区以上)仅为2.3%,昆虫种类和数量有随海拔升高而减少趋势,但区系结构明显变化,仍以东洋区系种占主体地位。

Abstract:

A survey of insects in the middle of Shiwandashan mountain of south Guangxi was done.The results show that the insects registered belong to 12 orders, 104 families, 291 genera, 388 species.The orders that morespecies had been found were leoidoptera, coleoptera, Hemiptera and Orthoptera,and making up 19.33%, 8.30%, 17.01% and 17.01%, respecfively. The families that more species had been found were catantopidae (28 species), Pentatomomorpha (25 species), Coreidae (19speies), Reduviidae (12 species), Libellulidae (12 species), Hispinae (12 species), Papilionoidea swallowtai (12 species). The percentages of species colleected in each forert zone to total collections were:mountain top dwarf forest (higher than 850m above sea level) 8.4%; evergreen board leave forest (700~850 m), 4 orders, 12%, second tropical seasional rain forest (Valley.lower than 700m) 17orders, 48.8%; Pinus massoniana forest (230~400 m) 14 oders, 13.7%; economic forest (150~300 m elevation) 10 orders, 14.6%. Water area species were considerably rich, Paunally, Oriental species were 79.69%, among them Malaya Philippines element was 39.9%, China-Burma element 60.1%;Oriental-palearctic species 18.01%, world-wide species only 2.3%. Insect spedes and number tended to decrease with the increase of elevation but no apparently change in fauna struccture, oriental species held a dominant position.