捕食性颏花金龟口器形态的适应进化及功能研究(鞘翅目：金龟科：花金龟亚科)

Adaptive evolution and functional analysis of the mouthparts of predatory flower chafers( Coleoptera: Scarabaeidae: Cetoniinae: Cremastocheilini)

颏花金龟为捕食性,是花金龟亚科12族中食性最为特殊的类群,以其下唇的前颏极度扩大而得名。依据捕食对象及对应形态变异类型的不同,其可分为蚁食性和蚜食性两类。由于颏花金龟的食性异于其他种类花金龟的植食性,栖息环境也有极大的不同,故其口器适应进化出诸多形态类型。通过比较颏花金龟、花金龟亚科其他种类、其他植食性金龟(丽金龟和犀金龟两个亚科为代表)以及典型肉食性甲虫口器的形态,对颏花金龟口器特殊结构及功能进行了分析,并初步探索了取食机制及颏花金龟的生存策略。

The tribe Cremastocheilini is the most specialized group among the 12 tribes of the Cetoniinae （Coleoptera： Scarabaeidae） , which are named for their extremely expanded permentum. The Cremastocheilini are predaceous and can be divided into ant-feeding and aphid-feeding ecotypes on the basis of different feeding habits and morphological variation. There are large differences in the morphology of mouthparts between Cremastocheilini species and the herbivorous cetoniins. We here compare the mouthparts of the Cremastocheilini, Cetoniinae, Rutelinae, Dynastinae and typical carnivorous beetles. The special structure and function of the mouthparts are analyzed and the purpose of the feeding mechanism discussed.