Alisporites sp. (Fig. 12Q)

Alisporites sp. A, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 183, pl. XVIII, figs 4, 7, 8 (2009).

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION Bisaccate pollen grain. Central body spherical. The sacci are semi-circular, about as high as the central body, and wrap the proximal face. The exine is about 1.5 µm thick. Total width = 43 µm. Central body diameter = 25 µm. Sacci (length × width) = 15 × 28 µm.

BOTANICAL AFFINITIES

Gymnosperms, Pteridospermales?