“…This study demonstrates the value of new discoveries in broadening our understanding of the complexity of the vegetation that grew in ancient landscapes. Heinrichsia cheilanthoides, together with recently discovered fossils of members of several other fern families, including Thyrsopteridaceae, Cystodiaceae, Dennstaedtiaceae, Lindsaeaceae, and eupolypods incertae sedis, in Burmese amber (Poinar & Buckley, 2008;Regalado et al, 2017aRegalado et al, , 2017bRegalado et al, , 2018bSchneider et al, 2016b;Li et al, 2018Li et al, , 2019, suggests that the Cretaceous amber forests of Myanmar were characterized by a rich fern flora, which appears to have been dominated by polypods based on the evidence gathered to date (Schneider et al, 2016b). We are well aware of the facts that this assessment is very preliminary and that detailed observations of many more specimens and forms will be necessary to complete the inventory of ferns in Burmese amber.…”