Palynology of Middle Tertiary lacustrine deposits
Palynology of Middle Tertiary lacustrine deposits
Palynology of Middle Tertiary lacustrine deposits
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262 K. TAKAHASHI & U. lux<br />
smooth; ectexine as thick as endexine.<br />
Measurements: 38 pm X 32 - 34 pm in diameter.<br />
Holotype: PI. 16, fig. 2; 38 X 34 pm in diameter; exine finely rugulate; ectexine intrabaculate;<br />
endexine smooth; ectexine as thick as endexine; pores<br />
4 pm m<br />
diameter; no. <strong>of</strong> specimen: Jos 1 - 3 (GN 5323).<br />
Derivation <strong>of</strong> name: rotundus (lat.) = round, porifer from porus + ferre (lat.) =<br />
having pores.<br />
Remarks: The new species resembles Subtriporopollenites intraconstans Pflug and S.<br />
villosus Pflug from the Paleogene <strong>of</strong> Germany, however, differences do exist in the<br />
sizes as well as in the structures and sculptures <strong>of</strong> the exines.<br />
Botanical affinity: ? Juglandaceae.<br />
Genus Subtriporopollis Sah 1967.<br />
Type species: Subtriporopollis tenuis Sah 1967.<br />
Subtriporopollis reticulatus n. sp..<br />
PI. 16, figs. 17-18.<br />
Diagnosis: Triporate pollen <strong>of</strong> circular outline. Pores relatively large, round, 3 - 6<br />
pm in diameter, equatorially placed; annulus present. Sculpture <strong>of</strong> exine reticulate;<br />
lumina <strong>of</strong> reticulum 1 - 3 pm in diameter; tectum or muri 1 pm high; endexine<br />
smooth, 0.5- 1 pm thick.<br />
Measurements: 29 - 32 pm X 29 - 30 pm in equatorial diameter.<br />
Holotype: PI. 16, figs. 18a-b; 32 X 30 pm in equatorial diameter; ectexine reticulate;<br />
lumina 1 - 2 pm in diameter; muri baculate, 1 pm long; endexine smooth, 0.5 pm<br />
thick; no. <strong>of</strong> specimen: Jos 1 - 8 (GN 5328).<br />
Derivation <strong>of</strong> name: reticulatus (lat.) = like a net or network.<br />
Remarks: The new species somewhat resembles both Subtriporopollis tenuis Sah<br />
0967, pp. 119-120, pI. X, fig. 16) and S. rotundus Sah 0967, p. 120, pI. X,<br />
figs. 17-10)<br />
from the Late Neogene <strong>of</strong> the Rusizi valley, Burundi, however, the<br />
sizes <strong>of</strong> the pollen and their pores are not alike. Tiliaepollenites tropicus Takahashi<br />
0982, pp. 322-323, pI. 53, figs. 23-24) from the Eocene <strong>of</strong> Yogyakarta, Java is<br />
also smaller than Subtrioropollis 'reticulatus n. sp.<br />
Botanical affinity: Unknown.<br />
Genus Anacolosidites Cookson & Pike 1954.<br />
Typoe species: Anacolosidites luteoides Cookson & Pike 1954.
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