A new genus and species Multiramificans ovalis gen. and sp. nov. of the family Siphlonuridae s.Z., is described from the Middle Jurassic Jiulongshan Formation of the Daohugou, Inner Mongolia in China. Detailed description and illustration of the specimen along with a brief review of fossil Siphlonuridae s.l. are given. The problems of association between nymphs and adults, and palaoenvironment are briefly discussed.