FIGURE 2. Prevalence (in black) of isoëtalean taxa in micro- and megafossil records (from Lopingian and Triassic Stages until the Rhaetian) in the fossil data compilation by Nowak et al. (2019). The ...

Introduction: Natural hybridization is common and plays a crucial role in driving biodiversity in nature. Despite its significance, the understanding of hybridization in ferns remains inadequate.