Abstract
A new genus and species of the extinct hemipteran family Hylicellidae, Sinohylicella sigmoidea gen. et sp. nov., is described and illustrated on the basis of a forewing specimen from the Middle-Upper Triassic Yanchang Formation of Shaanxi, northern China. The new fossil exhibits strongly curved CuA and PCu veins, peculiar characters adding to the morphological disparity of Triassic Cicadomorpha. The diagnoses of the Hylicelloidea, and its component families Hylicellidae, Mesojabloniidae, and Chiliocyclidae, are discussed.
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