Table 2.

Morphological characters of mega- and microspores of Selaginellaamblyphylla, S.bodinieri, S.dianzhongensis and S.kurzii.

Characters	S. amblyphylla	S. bodinieri	S. dianzhongensis	S. kurzii
Megaspores
Megaspores: proximal and distal surfaces	verrucae	verrucae	verrucae	verrucae
Megaspores: micro-sculptures	vermiculate	spinulose	densely echinate	vermiculate
Microspores
Microspores: proximal and distal surfaces	irregularly sized and spaced verrucae	irregularly sized and spaced verrucae	irregular size verrucae	irregularly sized and spaced verrucae
Microspores: micro-sculptures	dense spinules	not present	blunt spinules	dense spinules