Sinaeschnidia (meaning "Chinese Aeschnidium") is a genus of prehistoric dragonfly. S. heishankowensis is a common component of the Jehol Biota of northeastern China. It is known from numerous specimens, both and (adults).Zhang, J. (2000). "The discovery of aeschnidiid nymphs (Aeschnidiidae, Odonata, Insecta)." Chinese Science Bulletin, 45(11): 1031-1038. S. martinezdelclosi is known from slightly earlier deposits in Las Hoyas, Spain.Fleck, G. and Nel, A. (2003). "Revision of the Mesozoic family Aeschnidiidae (Odonata: Anisoptera)." Zoologica, 153: 1-170.
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