Neoraistrickia sp. 2, 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. 2 ( Fig. 7C, D )

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

provinces paléofloristiques du sud-est asiatique: 144, pl. IV, fig. 14 (2009).

OCCURRENCE. — Ashikajima Fm (rare).

DESCRIPTION

Trilete microspore. Amb circular. The laesurae are straight and extend to the ⅔ of the spore radius. The contact area is psilate, followed by more or less coarse bacula and some elongated, sometimes joined (particularly at the equator) coni near the equator and on the distal face. The exine is about 1.5 µm thick. Equatorial diameter = 45-50 µm.

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.