Palynology of Middle Tertiary lacustrine deposits

202 K. TAKAHASHI & U. JUX
omitted.
Botanical affinity: Polypodiaceae, Pyrrosia.
Gemmatosporis sp. b
PI. 3, fig. 8.
Description: Monolete spore, bean-shaped in equatorial view. Exospore threelayered,
2.2-2.5 pm thick, sculptured by small warts (verrcae or gemmae) in a
somewhat loose arrangement. Rather tight dehiscence mark extends in a long line
along the straight side of the spore.
Measurements: 87 pm in length and 60 pm in width.
Width I length ratio: 0.689.
Verrucae or gemmae I - 3 pm high and 1 - 2 pm thick.
Remarks: Only one specimen was found.
Botanical affinity: Polypodiaceae, Pyrrosia.
Genus Reticulosporis Krutzsch 1959.
Type species: Reticulosporis miocenicus (Selling 1944) Krutzsch 1959.
?Reticulosporis sp.
PI. 8, fig. 1.
Description: Monolete (?) spore with an oval contour in approximately equatorial view.
Exospore 1. 5- 2 pm thick, completely covered by a regular, alveolate reticulum;
large muri 2 - 3 pm high. Dehiscence furrow obscure.
Measurements: Size of the specimen 65 X 38 pm.
Diameter of the lumina in the reticulum 2 - 5 pm.
Width I length ratio: 0.58.
Remarks: Due to the obscure dehiscence mark it is questionable, whether the present
spore belongs to the genus Reticulosporis or not. Potonie (1966) and Strivastava
(1971) consider Reticulosporis Krutzsch (1959) as a junior synomym of Microfoveolatosporis
Krutzsch (1959).
Botanical affinity: Unknown.
Genus Perinomonoletes Krutzsch 1967.
Type species: Perinomonoletes pliocaenicus Krutzsch 1967.