B. Papp szerk.: Studia Botanica Hungarica 30-31. 1999-2000 (Budapest, 2000)

Rákosi, László; Barbacka, Mária: Upper Cretaceous flora from Ajka (W Hungary). I. Thallophyta

Figs 9-15. - 9-12 = Horstisporites harrisii, borehole Kf-2, 805.0 m. - 9 = The distal side of the spóra, SEM, bar = 400 um. -10 = Reticules, bar = 200 um. -11 = The structure of the reticules, bar = 30 pm. - 12 = Surface of exosporium; SEM, bar = 5 urn. - 13-15 = Horstisporites harrisii. - 13 = The distal side of the spóra; SEM, bar = 400 pm. - 14 = The structure of the perine and exosporium; SEM, bar = 100 pm. - 15 = The same, bar = 60 pm.