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 16-25. - 16-18 - Erlansonisporites spinosus, borehole Kf-2, írom 800.7 m; SEM. - 16 = Distal view, bar= 200 pm. -17= Proximal view, bar = 200 um. - 18 = Proximal view, bar = 200 urn. - 19 = Minerisporites borealis, borehole Gy-12, from 540 m, bar = 300 urn. - 20-21 = Costatheca discoënsis, borehole Gy-9, from 590.4 m, bar = 300 pm. - 22-23 = Spermatites ellipticus subsp. minor, borehole Gy-12 from 528.6 m, bar = 50 pm. - 24-25 = Costatheca verrucata, borehole Gy-9, 474.4 m, bar = 1 mm.