Cicatricosisporites, R.Potonie & J.Gelletich, 1933

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 : 102

Cicatricosisporites sp. 3 ( Fig. 9E, F )

Cicatricosisporites sp. E, Legrand, Palynologie des dépôts Jurassique supérieur et Crétacé inférieur du Japon, et provinces paléofloristiques du sud-est asiatique: 160, pl. IX, fig. 8 (2009).

OCCURRENCE. — Ashikajima Fm.

DESCRIPTION

Trilete microspore. Amb triangular with convex sides.Tops are slightly raised. The laesurae are thin, raised, slightly undulating, and bordered by lips in the contact area. Exine cicatricose. On the proximal face, we can observe 3 sets of 4 muri which can fork in each interradial area. Those muri often roll up slightly before joining with the laesurae. The distal face shows muri which form triangles centered on the distal pole; however, those muri are undulating and intersect the bisecting line, alternating from one to another ( Fig. 11 ). Equatorial diameter = 40-60 µm.

BOTANICAL AFFINITIES

Schizaeales , Anemiaceae .

Figures

FIG. 9. — Spores from the Barremian of south-west Japan: A, B, Cicatricosisporites sp. 1, proximal and distal faces, Ashikajima Fm, II2f-U33d; C, D, Cicatricosisporites sp. 2, proximal and distal faces, Ashikajima Fm, II2a-G40d; E, F, Cicatricosisporites sp. 3, proximal and distal faces, Ashikajima Fm, II2h-Q57; G, H, Cicatricosisporites sp. 4, proximal and distal faces, Ashikajima Fm, II2f-Y56/1b; I, J, Cicatricosisporites mohrioides Delcourt & Sprumont, 1955, proximal and distal faces, Kimigahama Fm, I1a-M55; K-M, P, Ruffordiaspora australiensis (Cookson,1953) Dettmann & Clifford,1992 (K, L, proximal and distal faces,Ashikajima Fm,II2c-D62/4;M, P, distal face with detail, Kimigahama Fm, SEM-I1a); O, Matonisporites sp. 2, proximal face, Ashikajima Fm, II2a-J46/4; N, Q, Plicatella sp., proximal and distal faces, Ashikajima Fm, II2h-J54. Scale bars: 10 μm.

FIG. 11. — Ornamentation of the schizaealean forms corresponding to new species or taxa placed in open nomenclature.