Palynology of Middle Tertiary lacustrine deposits

228 K. TAKAHASHI & U. lux
PI. 27, fig. 11.
Description: Tricolporate pollen of broad-ellipsoidal or subprolate shape with
hemispherical polar cap in equatorial view. Three narrow colpi with meridionally
elongated pores, rather robust, radially symmetrical, converging at the poles. Exine
smooth, two-layered, 1. 5 .urn thick; ectexine double as thick as endexine.
Measurements: 36 X 31 .urn in size.
Width / length ratio: 0.86.
Remarks: Only one specimen is recorded which is rather similar to Cupuli/eroipollenites
prolongatus Takahashi (Takahashi & Kim, 1979, p. 44, pIll. figs. 30-31) from
the Middle Miocene Yonil Group of Korea, but differs because of its small size and
stout proportion.
Botanical affinity: Unknown.
Cupuliferoipollenites sp. b
PI. 29, figs. 22a - b.
Description: Tricolporate pollen of broad-oval or subprolate shape with subhemispherical
polar cap in equatorial view. Three broad colpi, symmetrically arranged,
with lalongated pores. Exine chagrenate, two-layered, 1.5.um thick; ectexine as
thick as endexine.
Measurements: 20 X 16 .urn in size.
Width/ length ratio: 0.8.
Remarks: The only specimen detected is quite similar to Cupuliferoipollenites pusillus
(Potonie) Potonie from the Tertiary in Europe with the exception of its broader proportion.
Botanical affinity: Unknown.
Genus Tricolporopollenites Pflug & Thomson 1953.
Type species: Tricolporopollenites dolium (Potonie 1931) Thomson & Pflug 1953.
Tricolporopollenites sphaeroideus Takahashi & Jux
PI. 28, fig. 8.
1986 Tricolporopollenites sphaeroideus Takahashi & lux, Bull. Fac. Liberal Arts, Nagasaki
Univ., Nat. Sci., vol. 26, no. 2, pp. 158-159, Taf. 24, Fig. 27; Taf. 25, Fig. 7.
Diagnostic characters: Tricolporate pollen of globular shape in equatorial view. Three