Fig. 1

a Map showing the location of Zhejiang Province (gray area) in China (modified after the National Bureau of Surveying and Mapping of China, Reference Nos. GS(2016)1603 and GS(2016)2884); b Map showing the location of Xinchang County in Zhejiang Province; c Geological map of the Xinchang Basin showing the fossil collection site (wood stem symbol) (revised after Duan et al. 2002). 1–Quaternary; 2–Tonglingzhu Formation; 3–Chaochuan Formation; 4–Guantou Formation; 5–Moshishan Group; 6–Granite; 7–Geological boundary; 8–Fault; 9–Fossil wood; 10–County; 11–Town and village; 12–County boundary