The Early Cretaceous Jehol Biota, one of the most important Mesozoic lagerst？tten in East Asia, is especially well-known for occurrences of fossil feathered dinosaurs and early angiosperms. However, the terrestrial biodiversity, especially the fossil wood record, is poorly known.
In recent years, Prof. WANG Yongdong from Nanjing Institute of Geology and Palaeontology, CAS (NIGPAS) and his team have investigated several structurally preserved coniferous wood specimens from the Lower Cretaceous Yixian Formation from the Heichengzi Basin in Beipiao of western Liaoning, Northeast China. Four species referred to four genera of fossil wood are described, including Taxodioxylon heichengziense sp. nov., Thujoxylon beipiaoense sp. nov., Sciadopityoxylon liaoningense Ding and Protocedroxylon shengjinbeigouense sp. nov.
These new records enlarge the fossil wood diversity of the Yixian Formation up to 10 species in 9 genera, and provide further insights into the forest vegetation composition of the Early Cretaceous Jehol Biota. Systematic analysis of the floral constitution indicates that the petrified forests of the Yixian Formation are dominated by conifers, represented by Araucariaceae, Podocarpaceae, Sciadopityaceae, Pinaceae and Cupressaceae in the western Liaoning region. Palaeoclimatical analysis of the fossil wood assemblage implies that the western Liaoning region was dominated by a cool temperate, wet and seasonal climate with variable interannual water supply in the western Liaoning region during the Early Cretaceous. This may provide potential links of palaeoclimate variations and occurrences of feathered dinosaurs of the Early Cretaceous Jehol Biota.
Information of publication: Ding QH, Tian N*, Wang YD*, Jiang ZK, Chen SW, Wang D, Zhang W, Zheng SL, Xie AW, Zhang GQ, Liu ZJ, 2015. Fossil coniferous wood from the Early Cretaceous Jehol Biota in western Liaoning, NE China: new material and palaeoclimate implications.Cretaceous Research, 61, 57-70.
Thujoxylon beipiaoense sp. nov. and its anatomical features from the Early Cretaceous of Yixian Formation in western Liaoning, China
Sciadopityoxylon liaoningense from and its anatomical features from the Early Cretaceous of Yixian Formation in western Liaoning, China
