Aeschnidiid nymphs from the Jehol biota (latest Jurassic–Early Cretaceous), China, with a discussion of the family Aeschnidiidae (Insecta, Odonata) |
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| Authors: | Junfeng Zhang |
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| Institution: | Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, 210008, China |
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| Abstract: | Undoubted fossil nymphs of the family Aeschnidiidae within the Aeschnidioidea of the Anisoptera, Odonata are identified and described and their phylogenetic relationship and bioecological characteristics are deduced. The nymphs discovered previously in China, Mongolia and Russia and considered to be aeschnidiids are, in fact, unrelated to this group. All nine Chinese species in six genera can be merged into one alone, Aeschnidium heishankowense. It is the first animal from the ‘Jehol biota’ of East Asia to be linked with the species known from the Lower Tithonian of Germany. The geological age of the oldest strata bearing the fossil nymphs is debatable; it could be latest Jurassic rather than Early Cretaceous. |
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| Keywords: | Odonata Aeschnidiidae nymphs adults Upper Jurassic– Lower Cretaceous Jehol biota East Asia taxonomy ecology |
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