The diversification and systematics of Mesozoic Auchenorrhyncha (Hemiptera) from China

Publication Type:Conference Paper
Year of Publication:2016
Authors:X. Zhang, Yao, Y., Ren, D.
Conference Name:The 7th International Conference on Fossil Insects, Arthropods and Amber
Date Published:26/04/2016
Publisher:Siri Scientific Press
Conference Location:National Museum of Scotland, Edinburgh
Abstract:

The Lower Cretaceous Yixian Formation and the Middle Jurassic Jiulongshan Formation from northeastern China, and the early Miocene Garang Formation from the northeastern Tibetan Plateau, have yielded many well preserved insect fossils. We conducted morphological studies and phylogenetic analyses to provide insights into their evolutionary trends, origination and dispersal. To date, we have described many new species assigned to the families Palaeontinidae, Tettigarctidae, Procercopidae, Sinoalidae, Erlangshanidae, Fulgoridiidae and Cixiidae. Our principal findings and their significance are as follows:• A new hairy species of Tettigarctidae provides evidence that tettigarctids with long dense hairs had appeared by the latest Middle Jurassic. • A new species of Cixiidae was described, representing the first fossil insect from Qinghai Province, and providing potential information on the climatic condition of Zeku in the Early Miocene. • A fossilised pair of copulating froghoppers indicates that genitalic symmetry and mating position in froghoppers have remained static for more than 165 million years. • The intra-specific and individual variations of Palaeontinidae and numerous other insect fossils probably indicate long-lasting ecological stresses and a competitive environment in the Middle Jurassic to Early Cretaceous palaeoecosystems. These findings from the Middle Jurassic to the Early Miocene of China have enhanced our knowledge of Auchenorrhyncha and provided the foundation for future studies of new fossil (rock and amber) specimens.

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