Plenasium xiei sp. nov. from the Cretaceous of Northeast China: Additional evidence for the longevity of osmundaceous ferns
Ye-Ming Cheng, Feng-Xiang Liu, Ning Tian, Yue-Gao Jin, and Tong-Xing Sun
J Syst Evol . 2021, (2): 375 -387 .  DOI: 10.1111/jse.12532