known from Liaoning. Other invertebrates Flora Survey based on Wang et al. 2006 unless otherwise noted. Bennettitales Cycad-like plants, the most abundant plant group in the formation. 27 species in 11 genera. Ginkgoales Prehistoric ginkgo trees, common, with 11 species present in 6 genera. Pinophyta Conifers, 5 species present in 4 genera. Pteridophyta Leptosporangiate ferns, represented by 17 species in 8 genera, are the second most abundant plant type in the formation. Other plants Cycads, fairly diverse, with 10 species present in 2 genera. References Geologic formations of China Jurassic System of Asia Jurassic China Bathonian Stage Oxfordian Stage Sandstone formations Shale formations Tuff formations Coal formations Coal in China Formations Lagerstätten Paleontology in Liaoning Paleontology in Hebei