Palynology of Middle Tertiary lacustrine deposits
Palynology of Middle Tertiary lacustrine deposits
Palynology of Middle Tertiary lacustrine deposits
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234 K. TAKAHASHI & U. lux<br />
Intrabaculitricolporites rugoporosus n. sp.<br />
PI. 29, figs. 16-20.<br />
Diagnosis: Tricolporate pollen <strong>of</strong> broad-ellipsoidal to spherical or subprolate to<br />
spheroidal shape. Three conspicuous colpi are rather deep and extend symmetrically<br />
to the apices where they converge. A cavium is developed in each apocolpium.<br />
Exine two-layered,<br />
1 -1.5 ,urn thick, intrabaculate; ectexine as thich as endexine.<br />
Pores equatorially lengthened (lalongate), a fine punctate ornamentation may occur<br />
around the pores.<br />
Measurements: 17-18 pm in length.<br />
15-18 pm in width.<br />
Width I length ratio: 0.88-1. O.<br />
Holotype: PI. 29, fig. 16; 18 X 17 pm in size; exine two-layered, intrabaculate, 1. 5<br />
pm thick; pores lalongate; width I length ratio: 0.94; no. <strong>of</strong> specimen: Jos 1 - 4<br />
(GN 5324).<br />
Derivation <strong>of</strong> name: rugosus (lat.) = wrinkled; porosus (lat.) = quality <strong>of</strong> being<br />
porous.<br />
Remarks: The new species is similar to Intrabaculitricolporites affinis n. sp., but differs<br />
in its smaller size and intrabaculate exine - structure.<br />
Botanical affinity: Unknown.<br />
Intrabaculz"tricolporites consularis Takahashi n. comb. consularis n. comb.<br />
PI. 29, figs. 4 - 5 .<br />
1961 Tricolporopollenites consularis Takahashi, Mem. Fac. Sci., Kyushu Univ., Ser. D,<br />
Geol., vol. 11, no. 3, p. 323, Taf. 24, Fig. 55-56 (pro parte).<br />
1979 Tricolporopollenites consularis Takahashi subsp. consularis, Takahashi & Kim,<br />
Palaeontographica, B, 170, Ltg. 1 - 3, p. 41, pI. 10, figs. 9 (d.), 10 - 27; pI. 11,<br />
fig. 2.<br />
1986 Tricolporopollenites consularis Takahashi consularis, Takahashi & lux, Bull. Fac.<br />
Liberal Arts, Nagasaki Univ., Nat. Sci., vol. 26, no. 2, p. 159, Taf. 25, Fig. 1.<br />
Diagnostic characters: Tricolporate pollen <strong>of</strong> oval or prolate shape in equatorial view.<br />
Three conspicuous colpi, extending in radial symmetry and parallel to each other<br />
towards the apices where they converge. Equatorial pores meridionally lengthened.<br />
Exine two-layered, intrabaculate, 1.5 pm thick; ectexine double as thick as endexme.<br />
Measurements: 23 - 29 pm in length.<br />
16-21 pm in width.
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