基于CT扫描及几何形态测量标记的中生代膜翅目昆虫口器多样性及演化序列分析

口器是昆虫形态结构研究中一个至关重要的部分，口器的起源、多样性以及与环境的协同演化一直是昆虫学研究领域的热点和难点。本项目拟以我国丰富的中生代膜翅目昆虫化石（包括缅甸白垩纪琥珀昆虫）为研究材料，并参考现生类群，综合运用形态比较方法、高分辨率计算机断层扫描及几何形态测量等技术和手段，整合定性与定量、宏观与微观、二维和三维等各方面数据，对膜翅目昆虫不同口器类型的起源、早期演化及其形态多样性进行研究。本研究将明确不同口器类型的形态结构特征及分异情况，完善不同口器类型形态结构变异信息；分析口器形态结构与生态环境、取食机制的关系；构建膜翅目昆虫口器演化和发展的组合序列；为探讨昆虫口器起源、早期演化，以及口器结构与取食机制、环境变迁之间相互关系等提供可靠的实证材料和理论依据。

Mouthparts is a crucial part of the insect morphological structures and so its orign, diversity and co-evolution with environment are hot and challenging research topic. We devote our attentions mainly to Mesozoic hymenopteran insect fossils (including Cretaceous amber from Myanmar). In addition, extant species will be used for reference in this program. Our studies focus on qualitative and quantitative methods, microscopic and macroscopic models as well as two-dimensional and three-dimensional dimensions to find out the origin, early evolution and morphological diversity of the different types of hymenopteran mouthparts. Based on morphological characters and morphological comparison method, fossil insect mouthpart types are recognized and the diversity level of mouthparts is reconstructed. Micro-CT approach is utilized to scan the morphological structure among different mouthpart types. In addition, we also observe the distinct variation among these different mouthparts by geometric morphometric analyses. Our results will explore the morphological characters and diversity of hymenopteran mouthpart types from the Mesozoic, and then to optimize the variation information of morphological structure; analyze the relationship between morphological structure of mouthparts and environment changes and feeding mechanism; further constructe evolutionary series of hymenopteran mouthparts. Therefore, this program will provide some reliable empirical materials and theoretical foundation for the origin, early evolution and the relationship between structure of the mouthparts and feeding mechanism and environment changes within Mesozoic Hymenoptera.