Neoraistrickia sp. 1, 1956

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 : 96

Neoraistrickia sp. 1 ( Fig. 7A, B )

Neoraistrickia sp . A, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 143, pl. IV, fig. 12 (2009).

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION

Trilete microspore. Amb rounded triangular. The laesurae are straight, slightly raised, and extend to the 3/4 of the spore radius. The two faces are densely covered by rounded to slender bacula mingled with some sharpened coni ( 3 to 7 µm high). The exine is 1.5 to 2 µm thick. Equatorial diameter = 50 µm with the ornamentation.

BOTANICAL AFFINITIES

Bryophyta or Lycopsida ( Selaginellaceae )?

Figures

FIG. 7. — Spores from the Barremian of south-west Japan: A, B, Neoraistrickia sp. 1, proximal and distal faces, Ashikajima Fm, II2c- U62/3d;C, D, Neoraistrickia sp.2,proximal and distal faces,Ashikajima Fm,II2c-H33/4;E, F, I, L, M, Klukisporites variegatus Couper,1958 (E, proximal face, Kimigahama Fm, SEM-I1a; F, distal face, Kimigahama Fm, SEM-I1a; I, L, proximal and distal faces, Kimigahama Fm, I1a-H48/1a; M, proximal face,Ashikajima Fm,SEM-II2c);G, J, Neoraistrickia sp. 3, proximal and distal faces,Kimigahama Fm,I1b-S68g; H, K, N-P, Lycopodiumsporites dentimuratus Brenner,1963 (H, proximal face,Kimigahama Fm,SEM-I1c; K, N, proximal and distal faces, Ashikajima Fm, II2f-M56/2; O, lateral view, Kimigahama Fm, SEM-I1a; P, lateral view,Ashikajima Fm, II2e-R56/2). Scale bar: 10 μm.