Palynology of Middle Tertiary lacustrine deposits

Palynology of Middle Tertiary lacustrine deposits 255
Stratigraphic range: Miocene to Pliocene in Midle Europe.
Germany: Early Miocene (Wolkenberg); Miocene-Pliocene (Klettwitz, NW­
Sachsen); Pliocene (Riiterberg I Elbe).
Remarks: The specimen differs slightly in thickness and sculpture of the wall from
the holotype, which was described from the Pliocene of Riiterberg I Elbe (Germany)
.
Botanical affinity: Gramineae.
Graminidites gracilis Krutzsch
PI. 15, fig. 10.
1970 Graminidites gracilis Krutzsch, Atlas, Lfg. VII, S. 58, Taf. 4, Fig. 12-20.
Diagnostic characters: Monoporate pollen grain. Figura spheroidal with a germinal
porus (=os) of 1.5 pm in diameter which is framed by an annulus of 2 -2.2 pm
width. Exine finely punctate, 0.5 pm thick but deformed by secondary folds.
Measurements: 16 X 16 pm in diameter.
Stratigraphic range: Miocene to Plio-Pleistocene in Middle Europe.
Germany: Miocene (Fiirstenwald, Gollnitz, Ville); Late Miocene (Konin);
Plio-Pleistocene (Kaltensundheim/Rhon).
Remarks: Only one specimen was found.
Botanical affinity: Gramineae.
Graminidites minor n. sp.
PI. 15, figs. 2 - 4, 6 - 9, 11-12.
Diagnosis: Monoporate pollen grains. Figura spheroidal to oval. Exine two-layered,
chagrenate to finely punctate, 0.5- 1 flm thick. Pore small, circular, 2 -3.5 pm
in diameter, without annulus.
Measurements: 14 - 27 pm X 12 - 25 pm in diameter.
Holotype: PI. 15, fig. 3; size 25 X 24 pm in diameter; exine chagrenate, 1 pm thick;
pore circular, 3 flm in diameter; no. of specimen: Jos 1 - 3 (GN 5323).
Name derivation: minor (lat.) = lesser in size.
Remarks: These specimens are rather small and unlike most other species without an
annulus around the pore.
Botanical affinity: Gramineae.
Graminidites sp. a