Cingutriletes sp. (Fig. 10Q)

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION

Cingulate trilete microspore.Amb rounded triangular with straight to convex sides.The laesurae are straight and extend to the ⅔ of the spore radius (a little before the cingulum). The cingulum is wide (4-5 µm, that is to say more than 1/5 of the spore radius). Exine psilate. Equatorial diameter = 30-35 µm.

BOTANICAL AFFINITIES

Filicopsida (Couper 1958), Lycopsida ( Selaginellaceae ?) (Pierce 1961).