Exploring the stem to crown group transition in Marattiales: A new species of frond from the late Permian of China with features of the Psaroniaceae and Marattiaceae

Two new isoetalean (Lycopsida) megaspore species representing the earliest occurrence of Henrisporites from upper Permian strata of Southwest China

“…The Xuanwei Formation unconformably overlies the Emeishan Basalt and is overlain conformably by the Kayitou Formation (Feng et al, 2020b). Plant megafossils of this formation have been investigated extensively (Zhao et al, 1980;Li et al, 1994;Hilton et al, 2004;He et al, 2008;He et al, 2010;He et al, 2013;He et al, 2020;He et al, 2021;Seyfullah et al, 2009;Wang et al, 2014;Wang et al, 2017;Feng et al, 2017;Yang et al, 2019;Guo et al, 2020;Feng et al, 2020a;Guo et al, 2021;Zhou et al, 2021;Feng et al, 2023) and indicate a typical Lopingian flora (Feng et al, 2020a) of the Cathaysian Realm (Meyen, 1987).…”