中国东北中生代晚期古蝉多样性及其演化历程（半翅目，蝉亚目）

Palaeontinidae is an extinct family of Hemiptera, with existed from the Triassic to the Mid Creatceous. Until now, it included 44 genera and 110 species, distributed in the Kyrgyzstan (Triassic of Issyk-kue and Sulucta, Jurassic of Sai-Sagul), Turkmenistan (Jurassic of Karabas-Tau), China (Jurassic of Xinjiang, Hebei, Gansu and Inner Mongolia; Late Jurassic to Early Cretaceous of Liaoning), Russia (Jurassic of Iya, Ust-Baley and Irkutsk, Early Cretaceous of Transbaikalia), Tadzhikistan (Jurassic of Shurab), Kazakhstan (Jurassic of Turgay), Australian (Triassic of Ipswich), South Africa (Triassic of Bird's River), Brazil (Cretaceous) and Spain (Late Jurassic to Early Cretaceous). The extinct family Palaeontinidae had the first appearance in the Middle Triassic of Australian. It was abundant in the Jurassic and became extinct by the Mid-Cretaceous. Mesozoic volcanic activity in eastern China commenced in the Late Triassic, gradually increased in intensity during the Early and Middle Jurassic. During the Late Jurassic the volcanism was very strong, while in the Early Cretaceous it was weaker and nearly terminated in the Late Cretaceous. The Northeast China, especially Jiulongshan Formation of Middle Jurassic and Yixian Formation of Late Jurassic to Early Cretaceous, yield a mass of notable fossils including abounded insects which provide important evidence for study of the origin and early evolution of insects. Among these abundant insect fossils, the record of fossil of Palaeontinidae are quite common in the insectiferous deposits from the Northeastern China, and often very well preserved and presenting distinct morphological disparity. These valuable materials are the important supplement to the record of world fossil palaeontinid and may aid study of their origin as well as their interactions between insects and plants. It is not very common to find fossil specimens with well-preserved and complete body, forewings and hind wings. Different venation pattern of forewings and hind wings is important for generic classification in palaeontinids. Well preserved specimens from Daohugou and Beipiao strata enabled us to fix accurately the characters of the wing and head. The section at Daohugou Village is composed of grey tuffaceous sandstone and sandy mudstone. The paleoenvironment reconstructed for this locality is a volcanic region with mountain streams and lakes. With recent discoveries, Daohugou area has proven to be one of the most important site for studying past diversity of the Palaeontinidae. By comparison, the Middle Jurassic palaeontinids diversity is greater than those in any other epoch, suggesting that the family probably went into its most prosperous stage in the Middle Jurassic. Their high taxonomic and morphological diversity suggests a high complexity of niche structure and a high level of specialization within the guild.

古蝉科为化石灭绝科昆虫，我国北方内蒙古地区和辽西地区蕴藏较为丰富的该科化石，通过对上述地区中生代晚期地层中古蝉科昆虫化石进行分类学研究，查明该类昆虫的种类、生境、时空分布及演替规律，建立该区古蝉科昆虫化石演化组合序列。在特征分析中充分利用化石材料所提供的信息，研究绝灭的古蝉科和现生蝉科之间的系统发育关系，探讨古蝉科的起源，演化及灭绝原因。对古蝉科昆虫的口器类型进行形态功能分析，探讨与植物演替的关系，重建我国北方地区古生态环境，为当前研究生物与生物、生物与环境之间相互作用的关系及演变历史提供可靠的地史材料和理论依据。

古蝉科为化石灭绝科昆虫，我国北方内蒙古地区和辽西地区蕴藏丰富的该科化石，本课题在研期间对上述地区中生代中侏罗统地层中的昆虫化石进行了大量的采集和征集，为本课题研究及今后的科学研究奠定了很好的基础，并以古蝉科昆虫化石作为主要研究对象，取得了一些科研进展：（1）通过资料整理，各国学者共描述鉴定古蝉科昆虫化石标本46属111种，其中我国学者以辽西和内蒙古两地发现的古蝉科昆虫化石标本作为主要研究对象，共描述发表24属55种。（2）详细研究古蝉科昆虫的翅脉差异，分析其翅脉可能的演化历程；（3）利用化石材料所提供的信息，对古蝉科口器进行特征研究，探究古蝉科的灭绝机制；（4）对古蝉科身体结构进行形态学分析，研究古蝉科昆虫的发音机制；（5）对比延伸相邻国家韩国化石产地，对韩国古蝉科昆虫化石进行研究，揭示古蝉科昆虫的起源和演化。结合本人工作性质特点，本课题共发表论文1篇，科普文章1篇，专著章节1篇，昆虫化石科普编著1部，策划并展出昆虫化石展览1个。