Palynology of Middle Tertiary lacustrine deposits

Palynology of Middle Tertiary lacustrine deposits
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Intrabaculitricolporites d. zolyomii Kedves
PI. 28, fig. 1.
1978 Intrabaculitricolporites zolyomii Kedves, Studia BioI. Hung., vol. 15, pp. 64 -65, pI.
XII, Figs. 28-30; Fig. 25.
Diagnostic characters: Tricolporate pollen grain. Figura subellipsoidal or subprolate
in equatorial view. The three narrow colpi converge in radial symmetry at the apices
and provide a cavium in each apocolpium. Exine two-layered, 1.8 pm thick; ectexine
intrabaculate; endexine weakly intrabaculate; both layers of equal thickness.
Pores equatorially lalongated.
Measurements: 17 X 14 pm in size.
Width / length ratio: 0.82.
Previous record: Middle Europe (Early Eocene).
Hungary: Early Eocene (Southern Bakony: Urkut).
Remarks: Kedves (1978) considered Tricolporopollenites praestans Takahashi (1962,
p. 16, Taf. 4, Fig. 48-53) from the Eocene Myojin Formation in Ishizuchi to be a
synomym of Intrabaculitricolporites zolyomii Kedves. This species is, however, subject
of dispute as it is furnished with lalongate pores and also smaller in size.
Botanical affinity: Unknown.
Intrabaculitricolporites d. quinet£i Kedves
PI. 28, figs. 17a - b.
1985 Intrabaculitricolporites quinetii Kedves, Acta BioI., N. Ser., Tom XXXI, Fas. 1­
4, p. 101, pI. V, figs. 15, 16.
Diagnostic characters: Tricolporate pollen grain. Figura ellipsoidal or prolate in
equatorial view. Three prominent colpi extend in radial symmetry from pole to pole;
caverna deep. Pores round, somewhat meridionally elongated. Exine two-layered,
2.5 pm thick in equatorial zone, 3.5 pm thick at the apices; ectexine intrabaculate,
much thicker than endexine; endexine slightly intrabaculate.
Measurements: 34 X 22 pm in size.
Width I length ratio: 0.65.
Previous record: South-East Asia (Tertiary)
Viet Nam: Tertiary (Blao).
Remarks: A diagnostic feature of this species is the thick intrabaculate exine.
Botanical affinity: Unknown.