Baculatisporites sp.

Legrand, Julien, Pons, Denise, Nishida, Harufumi & Yamada, Toshihiro, 2011, Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan), Geodiversitas 33 (1), pp. 87-135 : 94-96

Baculatisporites sp.

( Fig. 6N )

Baculatisporites sp. B, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et

provinces paléofloristiques du sud-est asiatique: 142-143, pl. IV, fig. 8 (2009).

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION

Trilete microspore. Amb circular. The laesurae are straight and extend to the 3/4 of the spore radius. The contact area is psilate. Small verrucae, coni and bacula (less than 1 µm long) are sparsely distributed near the equator and on the distal face. The exine is 1 µm thick. Equatorial diameter = 40-45 µm.

BOTANICAL AFFINITIES

Osmundales , Osmundaceae ( Dettmann 1963, 1994).

Figures

FIG. 6. — Spores from the Barremian of south-west Japan:A-F, I, J, Manumia japonica n. sp. (A, proximal face, Ashikajima Fm, SEM- II2b; B, distal face,Ashikajima Fm,SEM-II2b;C, F, proximal and distal faces, Ashikajima Fm,II2g-O68;D, E, proximal and distal faces, Ashikajima Fm, II2b-N21/4; I, J, proximal and distal faces, Ashikajima Fm, II2c-K65g); G, Pilosisporites verus Delcourt & Sprumont, 1955, distal face, Ashikajima Fm, SEM-II2c; H, L, M, Tuberositriletes sp. (H, proximal face, Ashikajima Fm, SEM-II2a; L, M, proximal and distal faces,Ashikajima Fm, II2b-U45/4);K, Pilosisporites brevis Delcourt & Sprumont,1955,proximal face,Ashikajima Fm,SEM- II2c; N, Baculatisporites sp., proximal face, Ashikajima Fm, II2b-Z40/3. Scale bar: 10 μm.