Cicatricosisporites sp. 1

(Fig. 9A, B)

Cicatricosisporites sp. B, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 159, pl. X, fig. 2 (2009).

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION

Trilete microspore. Amb rounded triangular. The laesurae are slightly undulating, bordered by lips, and extend to the ⅔ of the spore radius. Exine canaliculate. The proximal face is ornamented by 3 sets of 4 muri parallel to the equator and to the laesurae. The distal face shows 8 to 10 muri, 3 to 5 µm wide and separated by less than 0.5 µm, which are parallel among them and to one side (Fig. 11). The exine is thick at the equator (about 3 µm). The ornamentation of this form corresponds to the type VI-B defined by Krutzsch (1963). Equatorial diameter = 40-55 µm.

BOTANICAL AFFINITIES Schizaeales, Anemiaceae . Couper(1958) suggested an affinity of Cicatricosisporites with spores produced by Ruffordia Seward, and Skog (1980, 1982) an affinity with Pelletixia Watson & Hill (Schizaeaceae) .