Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan)
Author
Legrand, Julien
Author
Pons, Denise
Author
Nishida, Harufumi
Author
Yamada, Toshihiro
text
Geodiversitas
2011
2011-03-31
33
1
87
135
http://dx.doi.org/10.5252/g2011n1a6
journal article
10.5252/g2011n1a6
31ed99a5-9135-40a2-92a4-64217d9de577
1638-9395
4597011
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
.