Cercopoidea is a diverse insect group, but its early evolution, disparity and ecology remain unclear. Juroala daohugouensis Chen & Wang gen. et sp. nov., from the Middle–Upper Jurassic of north-eastern China, is established herein and described on the basis of 42 whole-bodied fossils, representing a new subfamily, Juroalinae subfam. nov. of the primitive family Sinoalidae. Chengdecercopis Hong, 1983 Hong, Y. 1983. Middle Jurassic fossil insects in North China. Geological Publishing House, Beijing, 148 pp. [Google Scholar] is transferred from Procercopidae to this new subfamily and Stictocercopis Fu & Huang, 2018 Fu, Y. & Huang, D. 2018. New fossil genus and species of Sinoalidae (Hemiptera: Cercopoidea) from the Middle to Upper Jurassic deposits in northeastern China. European Journal of Taxonomy, 115, 127–133. [Google Scholar] is also attributed to the new subfamily. Fangyuanini Chen & Wang trib. nov. is erected for Fangyuania Chen, Szwedo & Wang, 2018 from mid-Cretaceous Burmese amber. Our cladistic analyses recover the relationships within the Cercopoidea as follows: (Juroalinae + (Sinoalini + Fangyuanini)) + (Procercopidae + (Cercopionidae + five modern families)). The evolutionary history and morphological diversification in the Mesozoic is discussed based on our phylogenetic reconstruction. In addition, the abundant material in the present study not only indicates high intra-specific or even intra-individual variation caused by biological and/or taphonomic factors, but also reveals an extremely female-biased propensity, suggesting that the new taxon probably had adaptations to special palaeoenvironments in physiology, ecology and ethology (e.g. parthenogenesis and sociability).

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