竹蝗属物种特性比较研究

Comparative Study on Species Characters of Ceracris Walker

竹蝗属 (Ceracris)昆虫是东洋区特有成分。着重从地理分布、形态数量性状和染色体特征几个方面 ,对竹蝗属物种进行比较分析。结果表明 :竹蝗属昆虫在我国由南往北种类趋于减少 ,自东南向西北呈现长翅种类被短翅种类替代趋势。迄今已知的 7种中有 3个为多型种 ,云南省分布有 7种(亚种 ) ,已成为竹蝗的现代分布中心。竹蝗属昆虫的性染色体位次在种间表现出差异 ,染色体数目2 n♀ =2 4 (2 n =2 3)与竹类中最低倍性的一些现存原始种的染色体数目相一致。此外 ,根据测量数据 。

The grasshoppers of Ceracris Walker have been recognized as Oriental faunistic component. Seven species including three polytypic species of the genus were compared and analyzed based on the geographic distribution,morphometric characters and chromosomes of bamboo grasshoppers in detail. It was showed that the number of Ceracris species was reduced gradually from southern to northern China,and those species with long tegmina was replaced by the short one in the genus from southeast to northwest in China. Seven species (subspecies) of Ceracris distributed in Yunnan Province,where can be considered as the distribution center of bamboo grasshoppers. The genus Ceracris displayed the chromosome number 2n ♀=24 (2n =23),that was the same with alive original bamboo plants existed the lowest ploidy. The interspecies difference in location of X chromosome of these grasshoppers was very distinct. Otherwise,the standards have been indicated at first to mark types of bamboo grasshoppers based on morphometric characters.