Sciadopityspollenites serratus (R.POTONIÉ et VENITZ) R.POTONIÉ, 1958

Hofmann, Christa-Ch., Odgerel, Nyamsambuu & Seyfullah, Leyla J., 2021, The Occurrence Of Pollen Of Sciadopityaceae Luerss. Through Time, Fossil Imprint 77 (2), pp. 271-281 : 275

cf. Sciadopityspollenites serratus (R.POTONIÉ et VENITZ) R.POTONIÉ, 1958

Text-fig. 3a–f

O c c u r r e n c e. Locality 3, Vilui Basin opencast mine,

Russia.

D e s c r i p t i o n. Monad pollen of spheroidal to oblate shape, elliptical to circular in polar view and elliptical in equatorial view; equatorial diameter ca. 45.5 to 53.3 µm (LM) and 26.4 to 35.7 µm (SEM, N = 2); the polar diameter ca. 36.6 to 37.7 µm (LM) and 27.2 to 29 µm (SEM); wall thickness ca. 2.4 to 2.8 µm, nexine thinner than sexine; wall thickness at leptoma was not measurable under LM, but looks thinner; sculpturing verrucate, perforate covered densely with evenly spaced supratectal echini; leptoma sulcus shaped and much less ornamented.

R e m a r k s. These specimens are very comparable with extant pollen, but have smaller and fewer perforations than the Oligocene to Miocene Sciadopityspollenites serratus described below.

Figures

Text-fig. 3. Upper Cretaceous to Oligocene/Miocene Sciadopityspollenites taxa, all scale bars in LM and SEM overview images 10 µm, scale bars in SEM detailed images 2 µm. a–f: cf. Sciadopityspollenites serratus from Vilui basin (Siberia), a – LM image, equatorial view, b – SEM equatorial overview with leptoma, c – detail SEM of leptoma? and echinate verrucae, d – LM image equatorial view, e – SEM of distal polar view, f – SEM detailed view of verrucate, echinate perforate sexine sculpturing; g–i: Sciadopityspollenites serratus from Bayerhof Maar (Germany), g – LM image of proximal polar side, h – SEM overview of distal polar side, i – SEM detail of verrucate, echinate, perforate sculpturing.