Palynology of Middle Tertiary lacustrine deposits

Palynology of Middle Tertiary lacustrine deposits
267
PI. 19, figs.
4 a-b.
Description: Periporate pollen of circular outline. Exine 2 pm thick, thinning out
towards the apices and sculptured by closely spaced radial baculi; these appendages
are thicker developed outward the center where they fuse into a tectum; surface of
exine minutely punctate. Twelve pores which are placed in wide elongated or linear
depressions (=demicolpi), 11 - 17 pm long and 4 - 7 pm wide.
Measurements: 45 X 45 pm in diameter.
Remarks: The only specimen observed differs from Calystegiapollis thuringiacus
Krutzsch in the size as well as the thickness of the tectum.
Botanical affinity: Conovulaceae, Calystegia, Evolvulus, Hewittia etc.
Genus Sindorapollis Krutzsch 1969.
Type species: Sindorapollis psilatus (Mtchedlishivili 1961) Krutzsch 1969.
Sindorapollis sp.
PI. 19, fig. 5.
Description: Diplodemicolpate-paraporate pollen of pentagonal outline in oblique
view. Three pairs of pore-bearing demicolpi, rather long and narrow (17 - 20 pm
long x 2 pm wide). Sculpture of exine minutely punctate; wall baculate to densely
clavate; sculptural elements are 2 pm long.
Measurements: 42 X 37 pm in diameter.
Remarks: The single specimen is comparable with Sindorapollis psilatus (MtchedI.)
Krutzsch from the Senonian of the Western Siberian Lowlands, USSR and Sindorapollis
nataliae Salard-Cheboldaeff n. comb. from the Oligocene to Early
Miocene of the Cameroons. S. psilatus possesses three pairs of pores at the
equatorial ends of the demicolpi and S. nataliae is covered by a retculate sculpture.
Botanical affinity: Caesalpiniaceae, Sindora.
Genus Graniperipollis Krutzsch 1966.
Type species: Graniperipollis bohemicus Krutzsch 1966.
Graniperipollis sp.
PI. 21, figs. 2 a-b.
Descrption: Periporate pollen of circular outline. Surface of exine sculptured by small,
densely-arranged granula; wall two-layered, 1. 7 pm thick; ectexine intrabaculate-