Palynology of Middle Tertiary lacustrine deposits

232 K. TAKAHASHI & U. lux
intrabaculate or intrarugulate; endexine smooth; ectexine double as thich as endexme.
Mesurements: 26-27 pm in length.
22 - 35 pm in width.
Width / length ratio: O. 85 -1. 0 (> 1. 0) .
Holotype: PI. 27, figs. 6 a - b; 26 X 22 pm in size; exine intrabaculate, 1. 5 pm thick;
pores large and circular; width / length ratio: 0.85; no. of specimen: Jos 1 -
5321) .
1 (GN
Name derivation: rotundus Oat.) = rounded, circular; porosus Oat.) = the quality
of being porous.
Remarks: The new species is rather similar to both Faguspollenites sphaericus
Takahashi (Takahashi & Kim, 1979, p. 46, pI. 15, figs. 1 - 5) from the Miocene
Changgi and Yonil Groups of Korea and Faguspollenites (al. Tricolporopollenites)
nagatoensis Takahashi n. comb. (1961, p. 328, Taf. 26, Fig. 1 - 3) from the
Eocene to Miocene of West Japan, but differs from F. sphaericus in a thicker and intrabaculate
exine and from F. nagatoensis in its smaller size and thicker exine.
Botanical affinity: Unknown.
Intrabaculitricolporites affinis n. sp.
PI. 27, figs. lOa - b; pI. 28, figs. 5 - 7 ,
9 -10, 12-13; pI. 29, figs. 2 - 3; pI. 38, fig. 3.
Diagnosis: Tricolporate pollen with a round-triangular contour in equatorial view.
The three distinct colpi are rather narrow and extend in radial symmetry to the
apices, where they converge. Pores are slightly elongated equatorially. Exine twolayered,
1 - 2 pm thick; ectexine intrabaculate; endexine smooth; ectexine double
as thick as endexine.
Measurements: 21-31 pm in length.
20 - 26 pm in width.
Width / length ratio: 0.85-1. O.
Holotype: PI. 28, figs. 6 a - b; 28.5 X 26 pm in equatorial diameter; exine twolayered,
1.5 pm thick; intrabaculate ectexine two times thicker than smooth endexine.
Pores elliptical in equatorial direction. No. of specimen: Jos 1 - 1 (GN532l).
Derivation of name: affinis Oat.) = adjacent or related
Remarks: The new species is very similar to Intrabaculitricolporites rotundiporosus n.
sp., but is invariably furnished with rather elliptical pores.
Botanical affinity: Unknown.