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本研究在观察比较隶属于鞘翅目天牛科3亚科16种天牛幼虫的外部形态特征的基础上,从结构与功能的角度,初步总结了天牛幼虫外部形态特征与危害特性的关系。结果表明:天牛亚科幼虫的上颚为圆凿型,沟胫天牛亚科和幽天牛亚科的幼虫上颚则为楔型。上颚圆凿型的天牛幼虫,外露上颚部分占头部面积比例值越小,上颚越发达;上颚楔型的天牛幼虫,外露上颚部分占头部面积比例值越大,上颚越发达。及时将粪屑排出蛀道外的幼虫之前胸背板、背腹部步泡突较发达,具有粗大的瘤突,气门相对面积比例较大;相反,不及时排出粪屑类的幼虫之前胸背板、背腹部泡突不发达,多具细皱纹,气门相对面积比例较小。
In this study, based on the observation of the external morphological characteristics of 16 species of Tian cow larvae belonging to the 3 subfamilies Coleoptera, Cerambycidae, the relationship between the morphological characteristics and the peculiarities of the larvae was summarized from the perspectives of structure and function. The results showed that the upper jaw of Tian Bei subfamily was round chisel, while the larvae of the genus Furiostigatus and Youdei Niuke were wedge-shaped. The palatoplasty larvae of the palatal-chord type show that the smaller the proportion of the exposed upper jaw in the head area, the more developed the upper jaw. The larger the ratio of the exposed upper jaw to the head area, the more developed the upper jaw. Timely excretion of larvae outside the tunnel before the thoracodorsal, dorsal abdomen step bubble more developed, with a large knob tumor, valve a larger proportion of the opposite area; on the contrary, not timely discharge of larvae of fecal class thoracodorsal, Dorsal abdomen Bubble underdeveloped, many with fine wrinkles, the proportion of the valve area is relatively small.