Cerebropollenites macroverrucosus (THIERG.) EBERH. SCHULZ , 1967

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 : 274-275

Cerebropollenites macroverrucosus (THIERG.) EBERH. SCHULZ, 1967

Text-fig. 2g –i

O c c u r r e n c e. Locality 2, Khovil opencast mine,

Mongolia.

D e s c r i p t i o n. Monad of spheroidal shape; circular to subcircular in polar and equatorial view; equatorial axes 35.5 µm (LM) and 26.6 to 31 µm (SEM, N = 1); equatorial diameter ca. 31.1 (LM) and 18.3 µm; wall thickness ca. 1.8 to 2.7 µm, probably thinning towards the leptoma; sculpturing rugulate to verrucate, unevenly and faintly perforate, with loosely arranged supratectal echini; leptoma covered with smaller echinate verrucae.

R e m a r k s. Here the rugulae and verrucae are the largest in the investigated pollen.

Figures

Text-fig. 2. Aptian to Albian Cerebropollenites taxa, all scale bars in LM and SEM overview images 10 µm, scale bars in SEM detailed images 2 µm. a–c: Cerebropollenites thiergartii from St. Pölten (Austria), a – LMimage, equatorial view, b – SEM equatorial overview with visible, less sculptured leptoma, c – detail of echinate verrucae; d–f: Cerebropollenites thiergartii from Khovil basin (Mongolia), d – LM image polar view with well visible thin-walled leptoma, e – SEM of proximal polar view with faintly sculptures leptoma, f – SEM detailed view of transition from leptoma to normal sexine sculpturing; g–i: Cerebropollenites macroverrucosus from Khovil basin (Mongolia), g – LM image of oblique equatorial view, h – SEM of oblique equatorial view with concave leptoma, i – SEM detail of the rugulate to verrucate sexine and smaller sculpturing in leptoma area.