Fig. 4. A–E in A new isoetalean microsporophyll from the latest Albian of northeastern Spain: Diversity in the development and dispersal strategies of microspores

Fig. 4. A–E. SEM micrographs of isoetalean masses from Isoetites sp. (MPZ 2010/919) from the uppermost Albian of northeastern Spain. In situ microspores showing distal face (A), distal face with characteristic tuberculate ornamentation (B), and proximal face with the laesura extending the whole length of the grain and psilate ornamentation (C–E). F, G. Dispersed isoetalean microspores of the genus Peromonolites from Estercuel deposits similar to herein described in situ ones.