摘要
Since the establishment of the genus Scleropteris based on sterile pinnae by Saporta in 1872, little has been reported about its fructification. Many palaeobotanists, however, believe that Scleropteris is a pteridosperm closely related to Pachypteris Brongniart and Ctenopteris Saporta (i. e. Ctenozamites Nathorst), or is a composite genus. Barale was the first one to cast doubt on the pteridospermous nature of Scleropteris based on
